The Integumentary System, Part 2 - Skin Deeper: Crash Course Anatomy & Physiology #7

Поделиться
HTML-код
  • Опубликовано: 24 дек 2024

Комментарии • 596

  • @hpis4me
    @hpis4me 6 лет назад +646

    I can’t believe these videos are free to watch. I paid about $550 to struggle in my A&P class (textbook excluded), meanwhile I watch this 10 minute video and feel amazing afterwards- this was SO HELPFUL! THANK YOU!!!!

  • @bryand6811
    @bryand6811 Год назад +192

    Notes for Integumentary System Part 2
    When we notice what integumentary system is doing, results are often uncomfortable
    sweat glands -> smell, oil glands -> zits
    skin -> scaly or greasy
    1st & most vital purpose of integumentary system = protective barrier
    skin, hair, nails, sweat, & oil glands all work together to shield from excessive sunlight, infections, abrasions,
    how you sense the world
    Cutaneous sensory receptors/corpuscles - structures part of nervous system in skin
    receive stimuli from outside environment & send stimuli to brain
    part of nervous system
    register diff sensations that associate w/ touch
    Types of Corpuscles
    tactile corpuscles - transmits sensations of light touch & low-frequency vibrations from periphery -> central nervous system
    lamellar corpuscles - register sense of pressure
    Hair follicles have receptors too -> why can feel slight breeze on skin or through hair
    More Functions of Integumentary system: removing waste, storing blood, and regulating body temperature
    Waste Removal
    Integumentary system excretes small amounts of waste eliminated through skin via sweat
    most nitrogen-containing wastes like urea, uric acid, and ammonia are disposed via urine
    isn’t much evidence that suggests heavy sweating rids body of any extra toxins, just losing more water
    Blood Storage Unit
    ~5% of entire blood volume retained in skin @ any given time
    when need more blood supplied to organs, (i.e.) when working out -> nervous system constricts dermal blood vessels to squeeze extra blood into circulation
    Body Temp Regulation
    During times of exertion, both blood & sweat glands work together to perform a key function: regulating body temp
    insensible perspiration = unnoticeable sweat
    even w/out exercise, body oozes out about 1/2 a liter of sweat per day to keep comfy temp
    No solute lost, just pure water
    sensible perspiration = noticeable sweat
    both solute & solvents lost
    could produce as much as 12 L of sweat per day
    To regulate heat loss dermal blood vessels constrict -> blood heads deeper into tissues & help keep vital organs warm
    Once things warm up, blood vessels in skin gradually relax & allow blood to return to surface
    Skin Discoloration: Cyanosis, Jaundice, and Erythema
    Changes in the color of skin can indicate homeostatic imbalances
    Cyanosis = Blue skin
    in Caucasian people may indicate heart failure, poor circulation, or severe respiratory issues
    cause blood that’s been depleted of oxygen turns darker in color, and when seen through lips/skin tissue, can look bluish
    Jaundice = yellowing of the skin
    usually signifies liver disorder
    Yellow bile starts accumulating in bloodstream
    Erythema = Reddened skin
    could indicate fever, inflammation, or allergy
    all of these conditions cause blood vessels to expand & more blood to flow to skin’s surface
    Human skin color wide spectrum, so some of these conditions easier to diagnose by looking for discolorations of other tissues (i.e. mucous membranes & beds of finger & toenails)
    Melanin, Vitamin D, and Skin Tone
    Melanin - pigment produced by melanocyte cells in epidermis
    2 forms: produces pigments that range reddish yellow -> brownish black
    main job = protect from sun’s ultraviolet rays
    Historically, where solar radiation more intense -> higher concentrations of deep-colored melanin
    closer to poles, where solar rays weaker & more diffused, lower melanin concentrations allowed people to collect what sunlight was available, to manufacture vitamin D
    Vitamin D - required by bones to keep producing new bone cells & only vitamin body can produce on its own
    skin cells have a molecule that converts to vitamin D when it comes in contact w/ UV light
    Vitamin path: skin -> bloodstream -> liver & kidneys
    where vitamin D is activated (calcitriol)
    Then calcitriol circulated to all bones of body
    Skin appendages - hair, nails, sweat, & sebaceous/oil glands
    Hairs/pili - flexible strands of dead keratin protein cells, like fingernails
    Cuticle - outermost layer of dead keratin cells
    looks like overlapping roof shingles
    conditioner evens out rough surface between those cuticle cells to make hair look smooth
    2 Main Regions of Hair
    shaft - where keratinization is completed
    root - part inside follicle where keratinization is still happening
    follicle - tube of epidermal cells
    just like in epidermis, cells @ bottom of each follicle are young & fresh, continually dividing & pushing older cells up through skin, into open air
    Finger & toenails pretty much grow same way
    start at @ back of nail bed where new cells divide @ root & get pushed forward
    creates scaly-hard keratin top layer
    2 Types of Sweat Glands
    Up to 3 million tiny sudoriferous/sweat glands distributed throughout body & secrete salty, watery sweat
    1. Eccrine glands - simple coiled tubes that start in dermis, extend through a duct, & open into a pore on skin’s surface
    more abundant than apocrine
    in palms, forehead, & soles
    2. Apocrine glands
    only have about 2000 apocrine sweat glands
    Activated around puberty, empties into hair follicles around armpits & groin
    secrete sweat w/ fats & proteins in it
    More viscous & sometimes yellowish in color
    when bacteria on skin combine with this sweat, it gets odorific- body odor
    Deodorants don’t affect amount of sweat, but reduces smells by attacking stink-making bacteria,
    antiperspirants are opposite, uses ingredients (i.e. aluminum) to block sweat glands & stop perspiration
    Some researchers believe these glands are human equivalent of musky sex scent glands, might help w/ mate acquisition
    Types of Apocrine Glands
    Mammary glands - secrete milk in lactating people
    Ceruminous glands - make cerumen/earwax
    Sebaceous (Oil) Glands - found everywhere but thick skin in
    ducts are smaller on limbs, but they’re pretty big on face, and neck, and upper chest
    Most secrete sebum/oily substance into hair follicles where it can travel to skin’s surface- cause pimples
    primary goal: soften & lubricate skin & hair
    help slow water loss from skin in dry environments

  • @shaemarcia9026
    @shaemarcia9026 6 лет назад +1187

    why is it that i understand more with you within 10 mins than i do with my professor in 50 mins.

    • @ChuckFreeburg
      @ChuckFreeburg 4 года назад +80

      Because he doesn't need to fill out 1 hour of time trying to seem smart. That prevents alot of useless conversations/over use of technical terms, straight to the point. The images help a ton also... He gets paid more when people watch more (assuming its his channel). Teachers get paid regardless. It might help also (seeings the thumbs up) knowing that people watching this video may be coming here on their free will to learn more. Whereas if you are comparing this to public school it is an obligation. So the intent/willingness to learn is very helpful...

    • @juanitaw156
      @juanitaw156 4 года назад +7

      Same

  • @Cubanboxxerr
    @Cubanboxxerr 8 лет назад +291

    I got a test in an hour, this series is my savior, thank you!

    • @TheFortFive
      @TheFortFive 5 лет назад +4

      Don Intrepid SAME

    • @SahilYadav-ck4qe
      @SahilYadav-ck4qe 5 лет назад +5

      im late but did u pass?

    • @quis398
      @quis398 5 лет назад +1

      @CeanZie same. I'll keep ya updated!!

    • @jacqui333.
      @jacqui333. 5 лет назад +1

      Quis how you do

    • @quis398
      @quis398 5 лет назад +23

      @@jacqui333. pretty damn good actually. Got a b.

  • @dylanmop6228
    @dylanmop6228 8 лет назад +199

    I love this show not only because of the value in self fascinated education but that I hardly ever see any negativity in the comments section
    We are all a great community with humor and a desire to learn and that makes me happy

  • @lai.readss
    @lai.readss 2 года назад +86

    coming on here to say even though these were put up 7 years ago, they are still so helpful!! I binged all of his videos for my A&P exam and made a 95! (almost a 100 if i hadn’t misspelled one word😀) BUT use these videos!! they teach you everything you need to know and more! So when your taking your exam you know more about each topic you studied!! (which helps if your teacher asks bonus questions)! So glad i started watching these :)

  • @thethreadgillthr33
    @thethreadgillthr33 6 лет назад +24

    My anatomy teacher has been using these videos as a broad, yet condensed review of what we go over in lecture. Pretty cool teacher.

  • @jev2damaximum934
    @jev2damaximum934 Год назад +4

    🎯 Key Takeaways for quick navigation:
    00:00 🧴 Integumentary system care
    - Highlights the practical uses of grooming products for skin, hair, and nails beyond vanity.
    00:52 🛡️ System protection
    - Outlines the integumentary system's role in protecting against environmental threats.
    02:54 💧 Thermal regulation
    - Combines temperature regulation, body's perspiration process, and the skin's function as a blood reserve.
    03:48 🌡️ Health indicators
    - Discusses how skin color variations can signal different health conditions.
    05:39 🧖 Appendage maintenance
    - Merges the maintenance and importance of hair, nails, and skin's surface care.
    07:01 💦 Gland functions
    - Simplifies the explanation of sweat and oil glands' roles in skin health and maintenance.
    09:23 📚 System summary
    - Summarizes the integumentary system's protective, sensory, and regulatory functions.
    Made with HARPA AI

  •  9 лет назад +212

    Am I blind or are there really no comments?! I just came to say that I thoroughly enjoy what Crash Course and all the people helping out do to make this possible. Thank you. ♥

    • @crashcourse
      @crashcourse  9 лет назад +77

      Aw, thank YOU for your kind words and for being another awesome member of this community :)
      -Nicole

    • @lekjiantan9508
      @lekjiantan9508 9 лет назад +9

      CrashCourse thank you so much for the videos! properly learnt more in it than in school.

    • @mmaking8664
      @mmaking8664 9 лет назад +8

      +CrashCourse u guys rule hank especially u u r one of the few cool nerds i have seen ;p

  • @rockercaterrorencountered4924
    @rockercaterrorencountered4924 7 лет назад +68

    I have vitiligo (white patches on my skin) and it was kind of cool to learn about skin and stuff. My patches are mostly on my head, so I have so white stripes in my hair, which is kind of cool. I have 1 next to my eye and 1 on my left ring finger, too.

  • @prodrumer33
    @prodrumer33 7 лет назад +26

    7:33 The sheer amount of joy at sweat that can appear yellowish in color.

  • @briacomer9077
    @briacomer9077 8 лет назад +23

    Love Crash Course...goes over the info way more in depth in 10 minutes than we do in my hour and a half class. One thing though - this video says your blood vessels constrict when you're working out in heat AND when you're cold. Your blood vessels dilate when you're exercising, bringing blood to the surface - that's why people get red when they're exercising. Might be a good idea to edit that part!

  • @sangheilientertainment5157
    @sangheilientertainment5157 7 лет назад +91

    "Now if you pluck out a strand of your hair, you will be in pain."
    -Hank Green
    The Wisest words ever spoken

  • @joshuacrane7590
    @joshuacrane7590 Год назад +9

    I couldn't imagine reading a book and trying to just imagine all this. thanks!

  • @janedi4691
    @janedi4691 6 лет назад +13

    I literally learn all the materials through video watching. This is so much better than my professor's teaching style. Thank you crashcourse for making anatomy interesting and understandable.

  • @andromedaramirez2604
    @andromedaramirez2604 9 лет назад +51

    crash course, please never stop posting. you guys are awesome.

  • @Swizzle62
    @Swizzle62 9 лет назад +3

    I like the speed of talking during this. Hank presents well. Plus, going over what was discussed at the end reinforces the concepts. These things are like speed learning video's compared to other vehicles of education.
    Damn those sebaceous glands..

  • @lizzcurly6946
    @lizzcurly6946 9 лет назад +9

    This saved my life in physio and anatomy review for nursing school. THANK YOU !!!!!!!!!!!!!

  • @JoshuaFletch
    @JoshuaFletch 9 лет назад +330

    Really blew my mind that the same kind of gland produces sweat, earwax and milk. Apocrine, you work too hard. Go on and take a vacation until we gotta feed a baby.

    • @pruittsteph24
      @pruittsteph24 9 лет назад +32

      Mammary glands and apocrine glands are different. Apocrine is just a mode of secretion. And the apocrine glands present in our armpits and pubic region actually do not use the apocrine mode of secretion as previously thought. They use the merocrine mode of secretion.

    • @JoshuaFletch
      @JoshuaFletch 9 лет назад +17

      Oh I see, it's just the same mode of transport with different actual rooted glands. That makes a lot more sense then.

    • @JoshuaFletch
      @JoshuaFletch 9 лет назад +10

      ***** Congratulations on turning 10 years old this year. That's gotta be really special for you.

    • @JoshuaFletch
      @JoshuaFletch 9 лет назад +9

      ***** Yep. High five. You really got me, oh boy i tell ya.
      Bye now.

    • @JESUSWASBORNINBETHLEHEM
      @JESUSWASBORNINBETHLEHEM 7 лет назад +5

      Omg😑

  • @AZCAj33per
    @AZCAj33per 6 лет назад +12

    These videos are literally my life support through A&P right now.

  • @crashcourse
    @crashcourse  4 года назад +94

    Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/2SrDulJ

  • @SoPrissyChrissy
    @SoPrissyChrissy 8 лет назад +8

    This show tickles and teaches me so much. The explanations are awesome. Grateful.

  • @simeonapajarillo6499
    @simeonapajarillo6499 29 дней назад

    Thanks!

  • @chelseajones2355
    @chelseajones2355 7 лет назад +5

    These videos helped me pass my A&P nursing course! I love these videos, they are very to the point on the main topics of each system. Great review tool for anyone! Love Hank Green!

  • @morodaye1417
    @morodaye1417 9 лет назад +135

    Not even CrashCourse can resist putting boobs in the thumbnail.

    • @cece4226
      @cece4226 9 лет назад +3

      Hehe, of course! lol

    • @saswatabagchi4982
      @saswatabagchi4982 4 года назад +1

      And 69 likes on this comment

    • @innerash_
      @innerash_ 4 года назад +4

      why are we liking this?

    • @nrggvrn5576
      @nrggvrn5576 4 года назад +1

      @@innerash_ because boobs

    • @innerash_
      @innerash_ 4 года назад

      @@nrggvrn5576 it’s not appropriate.

  • @edelainemaegabriel6100
    @edelainemaegabriel6100 5 лет назад +10

    You're awesome, continue doing such heroic acts for students by explaining these topics in a very well manner. You save us from the ambiguity that we get from the classroom. It even answers the questions that didn't exist in my mind. It really helps, most especially to me as a visual learner. Worth to subscribe

  • @toast3591
    @toast3591 Год назад +1

    Thanks hank for helping me last minute study an entire semesters worth of research

  • @OlleLindestad
    @OlleLindestad 9 лет назад +1

    5:00 Note that historical skin tone distribution doesn't simply follow the equator, with darker skin at lower latitudes. It also follows altitude (in mountainous areas, the sunlight is stronger) and coastlines (the surface of the sea reflects and amplifies UV light). :D
    Also, there are medical consequences to this. Everyone knows if you're light-skinned you need to watch out for sunburn, but if you're a dark-skinned person living far north or far south - make extra sure to get that sunlight in the winter!

  • @DoubledDeck
    @DoubledDeck 5 лет назад +4

    These are great! Talk about a genius way to entertain while teaching! Brilliant, I can not emphasize that enough.

  • @davidtimothy7319
    @davidtimothy7319 9 лет назад +6

    Hank, when you are done, we need a Crash-course Mathematics, and physics

  • @brittanyalford4795
    @brittanyalford4795 8 лет назад +62

    I love this channel! Its easy to remember things with the way they are explained. It's too funny. :) Very entertaining.

  • @dontwatchtheworldburn3673
    @dontwatchtheworldburn3673 9 лет назад +52

    I find it comforting that the woman around 8:00 finds a male and a female mate.

    • @queensaharaice7376
      @queensaharaice7376 9 лет назад +3

      Ikr?

    • @johnathankwoodard3021
      @johnathankwoodard3021 7 лет назад +20

      Uh.. did you just assume all three of their genders? What is this, 1845? Just gross.

    • @thegaspatthegateway
      @thegaspatthegateway 7 лет назад +12

      Johnathan K Woodard, that's incredibly immature to make fun of trans people, and a good probable indicator that you will never possess more than a single mate at a time, if even that many

    • @cly-9128
      @cly-9128 6 лет назад +6

      EV Belluche Implying its a good thing to aquire more than one mate that you spend the rest of your life with? Being happy and healthy and sharing that special love with that special person?
      What a poor nihilistic way to look at life. No wonder there is such a hugh prevalence with mental disorders and mental problems, too many people dont beleive they are worth anything, and instead put value in petty sex and put value in how many partners you've had putting quantity vs quality.

    • @Daruqe
      @Daruqe 6 лет назад +1

      wut?

  • @Naiadryade
    @Naiadryade 9 лет назад +2

    I have nerve damage in the skin of my hip as a result of surgery. This video taught me the words for it. My tactile corpuscles in that area no longer seem to have any functionality (no surface-level sensation at all). My lamellar corpuscles still do function, though perhaps have been altered (I can feel pressure in a tender, somewhat painful way, even almost 7 years later). I wish I knew a way to heal this!!!

  • @HannahTarr
    @HannahTarr 9 лет назад +342

    Does the skeleton have a name? The skeleton needs a name.

    • @Kameeho
      @Kameeho 9 лет назад +3

      His name is James Bonwinton.

    • @crashcourse
      @crashcourse  9 лет назад +256

      He does, indeed! His name is Stan ;)
      -Nicole

    • @Kameeho
      @Kameeho 9 лет назад +11

      CrashCourse
      That brings me to a interesting question.
      What is the factor that descides a Skeletons name?
      The person before its death had a name, but once its remains and skeleton is dug up and found and given a new name.
      What is then the true name? It's previous name or the current name?

    • @josephtong8311
      @josephtong8311 9 лет назад +19

      CrashCourse
      Wait, Stan Muller had his skin pulled off!?! Oh no!
      Oh well... ITS FOR SCIENCE!

    • @NaihanchinKempo
      @NaihanchinKempo 9 лет назад +2

      howbout Cedric as a name for the Skeleton :)

  • @AlatheiaEunomia
    @AlatheiaEunomia 5 лет назад +4

    I absolutely LOVE these videos and to be honest, my idea of a perfect man is Hank Green. He's hilarious! Carry on!

  • @TheDarkSidePower
    @TheDarkSidePower 7 лет назад +1

    This really is helpful when you are just trying to get the big picture for the whole chapter! Thanks

  • @micaelarichard9060
    @micaelarichard9060 9 лет назад +7

    Thank you! These vids definitely have helped with my A&P class!!

  • @juliahart721
    @juliahart721 5 лет назад +1

    Literally was reading this chapter in my lab book and now I understand it 100 percent

  • @JBbookfreak
    @JBbookfreak 9 лет назад +3

    Thanks for creating these! They help so much when reviewing for an A&P test!!

  • @gingerbraidgirl
    @gingerbraidgirl 9 лет назад +17

    Finally a Doctor Who Adipose at 2:10 :)

    • @sophiem399
      @sophiem399 9 лет назад

      +Ginger Braid Girl omg you're right how did you notice!?

    • @prehistoricgamer9503
      @prehistoricgamer9503 7 лет назад

      I know I'm late, but from your thumbnail it looks like you waited a while...

  • @jeffreykelley8155
    @jeffreykelley8155 7 лет назад +2

    These videos are really helping me with my Anatomy class... thank you!

  • @luisortega4991
    @luisortega4991 9 лет назад +9

    So useful and entertaining... thank you once more!!!! :)

  • @MayaRoseXO
    @MayaRoseXO 6 лет назад +1

    I So Love Watching These Videos!!

  • @ek5273
    @ek5273 9 лет назад +6

    0:12 Nice to see that Hank uses Hemp lotion.

  • @puddimilk1351
    @puddimilk1351 4 года назад +6

    Thank you John Green, after watching you for world history, I come back for biomedical science

  • @lizdestefano4905
    @lizdestefano4905 5 лет назад +5

    Question....? I wonder how many takes it took him to do this video and how much editing he had to do or is it just me?
    Very interesting! I love I'm a history and law enforcement major but I love working out and I'm curious of what my body is doing and Why.. I love these videos! Very interesting, I was thinking on signing up for Anatomy class next semester but I've rather watch these videos for now!

  • @roundthetrist8954
    @roundthetrist8954 8 лет назад +1

    Go CC for your inclusive/non-hormonormative pop-up (7:57) relating to body odour's possibility as a pheromone. Even if it is relating to body odour... :)

  • @animelovergirl1998
    @animelovergirl1998 7 лет назад +2

    Thank you crashcourse! Always helping me cram for my exams :)

  • @KrazyKatLady9393
    @KrazyKatLady9393 7 лет назад +11

    You make A & P fun, and remind me why I love science and want to try for Med School. Thank you.

  • @emilylu4193
    @emilylu4193 9 лет назад +4

    Hi Hank,
    I love your videos, they're so helpful and easy to listen to. I was wondering if you could please do a video on the cardiovascular system?
    Thanks so much!

  • @greenjoebean5567
    @greenjoebean5567 7 лет назад

    we're so blessed to have crash course

  • @Christian14789
    @Christian14789 9 лет назад +1

    Hope there will be a part 3. This is really really interesting

  • @VernessaBloom
    @VernessaBloom 6 лет назад

    Thank God these videos exist

  • @stephaniestout264
    @stephaniestout264 8 лет назад

    AH! At 2:04 there is an Adipose in the Adipose! Thought Cafe are Whovians and this makes my love and respect for you grow! Love your lessons, they are such a wonderful tool!

  • @gregleblanc8939
    @gregleblanc8939 9 лет назад +4

    8:08 yea yea punx, get some of each!

  • @ValerieInTheSky
    @ValerieInTheSky 7 лет назад +1

    at 19 seconds hilarious! Love you guys I have an exam today and have been binge watching

  • @AsianStephie
    @AsianStephie 9 лет назад +1

    Love your videos- especially with the animations

  • @ryuusei1907
    @ryuusei1907 9 лет назад +2

    I spotted a Body Shop hand cream in the pile of lotions! I love the stuff :D

  • @itzelsarmiento3487
    @itzelsarmiento3487 8 лет назад

    Very very helpful, specially fle my midterm today

  • @hb6839
    @hb6839 6 лет назад +5

    "It takes a lot of science to tame this mane," LMFAO YOU STRANGELY COOL PERSON

  • @taiipotatoie
    @taiipotatoie 4 года назад +2

    Thanks to this I might actually survive my test tomorrow

  • @CSSMLNDSMD100
    @CSSMLNDSMD100 9 лет назад

    Thanks Hank, you're a god amongst men

  • @brittaniemenzer9148
    @brittaniemenzer9148 9 лет назад

    this really helped me get a better understand. I will definitely be sharing this with my class mates.

  • @peaceforyouandme845
    @peaceforyouandme845 6 лет назад

    Ah...the true reason for skin color explained very neatly. 💓 love it. That’s it.

  • @eihabmunshi7297
    @eihabmunshi7297 9 лет назад +1

    Dear Crash course great staff, thank you for the great job.
    I have a question regarding the vascularity of the epidermis, if it's avascular then how does the nutrients and oxygen get to it's layers (the four or five)?
    And can we get a cut wound in our skin without bleeding?
    And in cosmotic surgeries when they put flaps for burn areas, is there a epidermal-flap only?
    Sorry for all these questions, and the world thanks you for your Job :D

  • @misscijimarie
    @misscijimarie 7 лет назад +1

    I supported after these videos! You are helping me through my A and P courses so that I can go on to dental hygiene. It is not much but I am happy to help out:)

  • @ashleycloud1567
    @ashleycloud1567 8 лет назад +1

    Thank you so much for these videos! I'm in medical assistant school, your videos really help me study 💗😊

  • @rachelblakesley7632
    @rachelblakesley7632 6 лет назад +2

    crash coarse youre doing fantastic, this is so correlated to my college level classes! I have the newest book and this video is on the exact same level. Thank you for your work, you really dumb things down and wrap them up beautifully. Will totally be subscribing and using your future videos to review! :)

  • @lisalbers230
    @lisalbers230 9 лет назад +1

    Hey Crash Course, I'm really enjoying these videoes. I watched Biology and part of Chemistry, but this one is more interesting. Also, 10 minutes is the perfect amount of time. 15 minutes can become too much some times.

  • @mellijelli30
    @mellijelli30 9 лет назад +1

    your videos are the best! it catches me attention while learning, thank you sooo much!

  • @vulcangaming3608
    @vulcangaming3608 6 лет назад

    You are the best you teach better than my teacher and less serious and fun you the best

  • @ms.superflous204
    @ms.superflous204 9 лет назад

    thank you very much with this crash course, it helps me to recall all things I've learned in college. . . . . . . .

  • @LeannaCherner
    @LeannaCherner 9 лет назад

    Love this! Can you guys do one about blood? white and red blood cells and all that and the process!! you guys are the best!!!

  • @starryeyed6659
    @starryeyed6659 8 лет назад +191

    Does that mean healthy hair is healthy dead cells? (´・_・`)

    • @GingeredHonii
      @GingeredHonii 8 лет назад +13

      YUP

    • @thegaspatthegateway
      @thegaspatthegateway 7 лет назад +2

      haha weird

    • @silvussol8966
      @silvussol8966 5 лет назад +28

      What fine looking cellular cadavers you have adorning your cranium. So moisturized, shiny, and well preserved.

    • @innerash_
      @innerash_ 4 года назад +2

      technically, yes.

    • @sowjhanyak997
      @sowjhanyak997 4 года назад +2

      @starryeyes That was my reaction when I heard about it for the first time ....😬pretty weird

  • @sierrahicks753
    @sierrahicks753 6 лет назад +1

    I love this show thank you it’s entertaining and easy to understand

  • @nathanhanson5324
    @nathanhanson5324 6 лет назад +1

    Thanks so much for these videos! Thanks to them, studying for AP is much easier and more interesting!

  • @gracebrewer4281
    @gracebrewer4281 5 лет назад

    Thank you Crash Course! I retain more from you than months in college lecture.

  • @ellajavelosa368
    @ellajavelosa368 8 лет назад

    love this. using this as reference for my report in school.

  • @reginafalange3149
    @reginafalange3149 9 лет назад +2

    SO HELPFUL :)
    I was wondering..do you guys use the Marieb and Hoehn textbook as a reference? These videos follow along with that book really nicely :)

  • @hopegarcia76
    @hopegarcia76 8 лет назад

    I caught that little adipose (Doctor Who reference) at the adipose layer in the hypodermis! Very funny!

  • @tammyesposito6493
    @tammyesposito6493 7 лет назад

    You are the best! Love your expressions (obvious & subtle) almost like you are making fun of the very content you are teaching. Entertaining and attention keeping! You are GOOD. ;-) I learn easily from you and even enjoy it!! I think you are doing what God created you for!

  • @JoshApproved
    @JoshApproved 9 лет назад +1

    If you donate to Crash Course, do they let you influence what course they teach next? I'm hoping for either an Economics course or Story Writing course, especially since John Green is a best selling author.

    • @briarl4813
      @briarl4813 9 лет назад +1

      I feel like I heard someone (John?) talk about a possible future economics course. I'm not sure at all, though. A story writing coure would be awesome, though.

  • @roidroid
    @roidroid 9 лет назад +4

    If our earwax is made by modified Apocrine glands, and Apocrine glands arise during/after puberty, does that mean that *we don't have earwax until we reach puberty?*

    • @sirBrouwer
      @sirBrouwer 9 лет назад +5

      Well no, earwax is there from as early as at least that you are a toddler. possibly even younger.
      But maybe earwax glands are the Mongolian of the Apocrine system.

    • @pruittsteph24
      @pruittsteph24 9 лет назад +9

      Apocrine glands are present prior to puberty. The ones activated by estrogens and androgens are those of the pubic region and armpit. The apocrine glands in our ears which secrete ear wax are active prior to puberty. Apocrine is just a mode of secretion... And not all apocrine glands use the apocrine mode of secretion.

    • @gl1500ctv
      @gl1500ctv 9 лет назад +3

      sirBrouwer As John would say: "Except for... you guessed it, the Mongolians!"

    • @queensaharaice7376
      @queensaharaice7376 9 лет назад

      +Stephen Furr Lol

  • @ReanimatedShad0w
    @ReanimatedShad0w 8 лет назад

    Great video. But there doesn't seem to be a video on touch? I know theres smell and taste.

  •  9 лет назад

    I'm watching my Watch Later playlist in 1.5x because there are too many videos here now.
    I can't watch Hank in 1.5x because DAMN HE SPEAKS QUICKLY

  • @RGX003
    @RGX003 9 лет назад +4

    im in 6th grade and we actually watch these videos in class

  • @BrandonRankin-z6h
    @BrandonRankin-z6h 11 месяцев назад

    THE COURSE IS an amazing. I love it so much and I

  • @mseeveemaster254
    @mseeveemaster254 8 лет назад

    i dont sweat enough. it has to be 90F befor i start to noticeably sweat at all. at work when the ac broke i still had to worked full speed in 80F and ended up on the floor, unable to get up, still just a slight dampness under my armpits. for people who assume that i didn't have enough water, i had 7 liters of water that day.

  • @BloomLikeGold
    @BloomLikeGold 5 лет назад +2

    A & P exam in 2 hours, this is gold for my revision 😂

  • @ilohnamczaqyah7566
    @ilohnamczaqyah7566 6 лет назад

    I need him as my Prof, I won't ever get bored 😂

  • @d1mple381
    @d1mple381 9 лет назад

    This helps in class so much thanks for making this.

  • @janekovlim1331
    @janekovlim1331 8 лет назад +56

    this is too fast for me .... i hope he would speaks a little bit slower than that

    • @xhandrahopebringer2735
      @xhandrahopebringer2735 8 лет назад +23

      I have trouble keeping up with him too - I end up generally just watching it twice. You can change the speed to .5 but it just makes him sound drunk! Mainly I'm just grateful these exist

    • @ClavinTheCat
      @ClavinTheCat 8 лет назад +7

      nah, just rewatch. i watched all of em 2x through and got a general idea and now im rewatching for specific names and terms

    • @charitymbrand6360
      @charitymbrand6360 7 лет назад +1

      that's the problem with most videos these days. God, I sound Old! LOL

    • @JESUSWASBORNINBETHLEHEM
      @JESUSWASBORNINBETHLEHEM 7 лет назад

      Jane Kov change th3 seen in upper right

    • @ashesmith6124
      @ashesmith6124 6 лет назад +6

      Just reduce the speed of the video. I watch him at .75X

  • @rockerinlove384
    @rockerinlove384 8 лет назад

    i would like to know if there is a way to avoid a skin cancer????

  • @umbreon6656
    @umbreon6656 9 лет назад +5

    Im glad I understand this cause its so GODDAMN INTERESTING I REALLY LOVE THIS VIDEOS

  • @sophiabellissimo6729
    @sophiabellissimo6729 9 лет назад

    I really appreciate the puns. Way to go!

  • @Pooterchu5269
    @Pooterchu5269 9 лет назад

    Can you guys do a crash course on the muscles?? PLLLLEEEEASSSSEE!? We're working through the muscles in my anatomy class and I need some SERIOUS HELP!!

  • @imagaintwonkabar4384
    @imagaintwonkabar4384 9 лет назад

    OMG in 2:09 there is a doctor who reference to the Adipose

  • @4mpersan
    @4mpersan 9 лет назад

    Was hoping to hear something about eczema in this one - guess I'll have to keep waiting! :)

  • @autumnblakesley1073
    @autumnblakesley1073 7 лет назад +1

    Much love for your videos! They have helped me so much in getting through all of my science courses! :)) THANK YOU