Gas Exchange in Fish

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  • Опубликовано: 23 дек 2024

Комментарии • 152

  • @reyna7100
    @reyna7100 8 лет назад +158

    Mr Pollock saving my A levels

  • @oliverdonaldson3599
    @oliverdonaldson3599 8 лет назад +3

    My teacher gave homework yet she never taught the class what we needed to know. Thank you so much! This, as well as your other videos, was super super helpful.

  • @jodiehanson2133
    @jodiehanson2133 4 года назад +6

    Your videos are helping me so much with my revision! They’re so clear and well laid out. YOU’RE GETTING ME THROUGH MY A LEVELS!!

  • @cyriactomy4589
    @cyriactomy4589 5 лет назад +2

    FINALLLY A DUD THAT EXPLAINS IT PROPERLY WITH PROPER COMPARISON

  • @susanh2523
    @susanh2523 6 лет назад +5

    this lesson was boring until I clicked on your video! Thank you so much. Your way of teaching is incredible

  • @rebeccadawson1544
    @rebeccadawson1544 9 лет назад +14

    Your videos are great! They're clear to understand, without wasting time

  • @issyb9102
    @issyb9102 8 лет назад +30

    Your explanation of counter current flow is so helpful. Before when I answered questions on it, id just regurgitate the text book answer without understanding it

  • @vkiwixii3426
    @vkiwixii3426 Год назад +1

    This is really helpful. I was struggling with this and only know base on the lesson but having this video up really help me understand better. Thank you.

  • @lottsofclay7006
    @lottsofclay7006 4 года назад +1

    online a levels would be so hard without you so thank you, ur summaries are amazing!!!!!

  • @gabijagervinskyte828
    @gabijagervinskyte828 3 года назад +1

    Thank you so much! I could not understand how countercurrent flow works but your video and explanation helped me tremendeously!

  • @haleywitt1801
    @haleywitt1801 9 лет назад +3

    This was really helpful to watch after having a hard time understanding countercurrent exchange during my class lecture. I appreciate the simple diagram showing opposite blood and water flow. Thanks!

  • @tonytor5346
    @tonytor5346 2 года назад +1

    Great info. As a physician, this is very interesting. When teaching physiology to medical school students, using comparative anatomy, it is very important to know evolution. One thing i think I frequently use when teaching gas exchange, is that the surface area in humans, a 70 Kg adult is equivalent to the surface area of a basketball court! - The Chinese ( who else would have the patience🙄) did that manually in the 1960’s. As you know O2 saturation in Room Air is 21%. O2 seats in humans are expected to be above 90%.
    The O2 content in water is much lower, so either the efficiency of gills oils much higher, or the oxygen binding system is much more effective. From what I remember most fish have Fe based. In humans during fetal development, the O2 saturation is 20% when they have fetal hemoglobin. This is more than sufficient to maintain normal development.
    DARPA & US NAVY have developed fluorine based fluids to fill human lungs which can maintain up to 6 h of oxygenation. Fluorine binds 5 oxygen molecules and the alveoli are filled with fluid. A very unpleasant process where one feels they are drowning, but when they calm down, all is normal. Moving the diaphragm causes turbulence which brings new molecules of fluosyl (R) in contact with the outermost part of the alveolus.
    From the time I was peripherally involved with this research in the early 90’s I believe they have found a way to replenish the O2 on the fluosyl (R) by gas permeable cartridges& O2 tanks, therefore extending the duration of the dive. Would love to correspond with you & exchange some ideas.

  • @OgunjobiOluwakemi
    @OgunjobiOluwakemi Год назад +1

    My biology teacher never thought me this,u area very awesome teacher

  • @kollinvanzandt7270
    @kollinvanzandt7270 Год назад +1

    Phenomenal video for visualization

  • @nathanaelsmalley8850
    @nathanaelsmalley8850 8 лет назад +6

    Thanks a lot- really helped me understand countercurrent flow better.

  • @utube22021901
    @utube22021901 8 лет назад +47

    I wish my biology teacher could teach this well.

    • @drd6482
      @drd6482 Год назад +2

      I CAN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! #areyouserious #yeahboi

  • @may6762
    @may6762 6 лет назад

    thank you so much!! i've been trying to understand countercurrent flow for AGES and reading about it just confused me more, but when you showed that diagram it immediately clicked!!! thank you for saving my ATAR!!

  • @caitlinroper7073
    @caitlinroper7073 8 лет назад +52

    How come my teacher never explained it that well and yet instead of 7 lessons it took you 7 minutes?!

  • @sal4439
    @sal4439 8 лет назад +3

    WOOOOW! this was such an amazing video thanks sooo much, so clearly explained and spoken so lovely. so informative thank u so much !

  • @cedardmd
    @cedardmd 8 лет назад +7

    Is there error in picture @3:00 ? The arrows of the water flow and blood flow seem to be incorrect on the far right picture. Let me know if I am off somewhere. Very helpful video and I enjoyed and understood much!

    • @MrPollockBiology
      @MrPollockBiology  8 лет назад

      You may have a point there! Well spotted...this is why I shouldn't borrow images from google!

  • @oioiyouthere
    @oioiyouthere 9 лет назад +6

    You're a life saver.
    Thank you ever so much, however, please do more exam paper tutorials!

  • @sorcus2144
    @sorcus2144 7 лет назад +1

    Why did I not subscribe sooner? Videos are brilliant, short and concise.

  • @diaryofmyaveragelife
    @diaryofmyaveragelife 9 лет назад +1

    I was wondering if you have the rest of unit 2 videos coming up, things such as Dna, classification, haemoglobin, Dna replication, the circulatory system (arteries, arterioles and veins)

  • @ThatDentistChic
    @ThatDentistChic 7 лет назад

    This was one of the best explanation !! Thank u Mr Pollock :)

  • @ohan8238
    @ohan8238 2 года назад +1

    Still helping me even though I'm no longer in Kellett :)
    Hi Mr Pollock!

  • @hubbabubba2756
    @hubbabubba2756 5 лет назад

    My teacher just gave up one day, played one of your videos, leaned back and scrolled through Facebook, and I honestly learnt more in 7 minutes than I would have in 7 lessons :/

  • @georgiav9507
    @georgiav9507 7 лет назад

    This was so helpful for my As bio exam this afternoon! Thank you!!

  • @dexactz
    @dexactz 6 лет назад

    This is a super good video, clearly explained what I could not understand

  • @の雪-m5f
    @の雪-m5f 8 лет назад

    very useful! This such simple video was better than my Biology teacher's teaching...

  • @lauradaniels294
    @lauradaniels294 8 лет назад +3

    Thanks, I found this video helpful and easy to understand.

  • @jialinfeng4255
    @jialinfeng4255 9 лет назад +9

    can we please have circulatory system, the arteries, veins..etc from aqa biology unit 2
    thanks!!!!!!

  • @beastlyjedi
    @beastlyjedi 9 лет назад +16

    weird question but what if the fish was out in say a space station, could the fish breathe as there wouldnt be gravity and so the fish's gills wouldnt compress like they would on the ground? so you could have a fish floating around the space station without it dying

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад +28

      beastlyjedi You're right…that is a weird question! And one that I'm unable to answer. One day, when I'm a RUclips multimillionaire, I will invest time and money into discovering whether this is true.

    • @beastlyjedi
      @beastlyjedi 9 лет назад +6

      Mr Pollock make sure to give me a shout when you achieve this! and thank you for the videos as well as they are helping me so much for my upcoming exam!!

    • @mcrrocks897
      @mcrrocks897 7 лет назад +1

      I think another reason-apart from the collapsing gill filaments-that fish can't breathe in air, is that more oxygen can more easily diffuse across the membrane when in solution such as water. It doesn't diffuse very well like that as a gas, so the gills would need to be very moist anyway. I think this is just unfeasible for the amounts fish would need to get into their blood.

    • @zakmilson5488
      @zakmilson5488 6 лет назад +1

      isn't space a vacuum? doesn't that mean there is no oxygen. I think the fish would freeze as well. don't know for sure though

    • @choily-5259
      @choily-5259 6 лет назад

      Zak Milson he said in a space station, so there will be oxygen inside

  • @kenazkamwela6774
    @kenazkamwela6774 4 года назад +1

    I love the way u explain things

  • @ellaee5814
    @ellaee5814 5 лет назад +1

    This video was brief and well-explained thank you!

  • @draiwestgate1913
    @draiwestgate1913 5 лет назад +1

    How do fish manipulate pressure changes in their mouth though? If it is lengthy to explain, can you link me to an article or something that can explain? Thanks

  • @sumaiyahahmed7706
    @sumaiyahahmed7706 8 лет назад +4

    this video helped me out so much and i even do ocr!thank you so much!

  • @CSRKPop
    @CSRKPop 6 лет назад +1

    does this still apply for the new spec?

  • @adamhaycock7982
    @adamhaycock7982 8 лет назад +1

    very useful Mr Pollock, thank you very much

  • @Kamal-xq3cx
    @Kamal-xq3cx 8 лет назад

    very simple and effective way to explain fish's gas exchange.

  • @kingAlvin-288
    @kingAlvin-288 Год назад +1

    Thanks for the specialised characteristics is the exchange system

  • @lucaswood2232
    @lucaswood2232 8 лет назад

    So would it be correct in saying that if a question asked me to explain counter con current flow to say " highly oxygenated water meets less oxygenated blood creating and maintaining a constant concentration gradient across the whole lamellae" ? Thanks

  • @lordoffacts
    @lordoffacts 5 лет назад +1

    Great video. Very well explained.👍🏻

  • @samk4367
    @samk4367 8 лет назад +5

    quick revision... now for some past paper questions! thanks

  • @AnimatedBlast
    @AnimatedBlast 6 лет назад +9

    Unfortunately for GCSE students in 2018 this is no longer AS only

  • @chocoholicxx1797
    @chocoholicxx1797 8 лет назад

    This is so helpful thank you, though i'm doing OCR and I think we do need to know about the pressure changes in the mouth and opercular cavity could someone explain??

  • @gamesquestjames1124
    @gamesquestjames1124 9 лет назад +32

    watching this after having fun dissecting a fish

  • @javi2542
    @javi2542 8 лет назад +1

    Such a great video!. Got a question though. What happens to other gases also dissolved in the water, like nitrogen... do they also get into the fish's lamella?

    • @nateriver559
      @nateriver559 8 лет назад +1

      +Javi yeah but I think it just doesn't get used during the counter current flow system and just flows out of the gills as it does not need nitrogen or other gases for respiration.

    • @javi2542
      @javi2542 8 лет назад +1

      Thanks for answering :)

  • @astikadeo3996
    @astikadeo3996 4 года назад +1

    Very well explained🤗🤩

  • @annienawila4557
    @annienawila4557 2 года назад

    Thanks very much for good explanation. I will use it to teach my class

  • @Stylinson34
    @Stylinson34 9 лет назад +2

    Best videos on youtube

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад

      Stylinson34 You're very kind! Glad they're helping you!

  • @hopemartin86
    @hopemartin86 8 лет назад +2

    Cute & smart!
    Great Video! 😁

  • @stembilematemera1368
    @stembilematemera1368 2 года назад +1

    Well explained thank you sir

  • @radhikakumar3399
    @radhikakumar3399 5 лет назад

    Thankyou for explaining so simply made my life easier

  • @LillyF513
    @LillyF513 7 лет назад

    great videos=liked, comment and now subscribed😀😊

  • @cameornlisajane
    @cameornlisajane 8 лет назад

    Fabulous video, very well explained. Thank you.

  • @nadia1032
    @nadia1032 7 лет назад

    fish has parallel flow or countercurrent flow or both?

  • @aaronmaraj8611
    @aaronmaraj8611 8 лет назад

    Writing up labs. This is very useful. #reallygrateful

  • @muskaanmemon8475
    @muskaanmemon8475 6 лет назад

    Can you explain what exactly is the gill arch?

  • @nyujun
    @nyujun 4 года назад +1

    2:53-3:35 the arrows are wrong on the right figure

  • @brent14able
    @brent14able 8 лет назад

    I have a possibly dumb question (sorry not a bio student here Haha!)
    On the counter current flow, how did the blood on the left side became more oxygenated than on the right side?
    Because for what i have know; as blood travels, its oxygen get distributed to other tissues thus, having a lesser amount of oxygenation the more the blood travels.

  • @Devy_45
    @Devy_45 3 года назад +3

    Where are its legs?

  • @rabiatumar1651
    @rabiatumar1651 9 лет назад +5

    Your videos are brilliant! Can you please go over mitosis and semiconservative replication and classification using DNA / courtship behaviour :)

  • @Alluka37
    @Alluka37 4 года назад +1

    Nice, but you didn't explain much about the other parts of the raspitory system or how the blood delivers oxygen to different parts of the body

  • @NalugoMaimunah
    @NalugoMaimunah Год назад +1

    Thanks to you 🎉 I like it

  • @humayrasgcse7499
    @humayrasgcse7499 6 лет назад

    This is in new spec for gcse bio thank u i thought i wouldnt ever understand this topic gcse paper 1 today😭

  • @alluhakbar6074
    @alluhakbar6074 2 года назад +1

    what so you mean by surface?

  • @SaraKhan-wq2pt
    @SaraKhan-wq2pt 5 лет назад

    Good job sir!👍

  • @Charreyy
    @Charreyy 8 лет назад +1

    very helpful😀😀😝thanks...

  • @drd6482
    @drd6482 Год назад +2

    Mmm #hehehehe #goss #tuesday #yeahboi

  • @Phil_Jumaa
    @Phil_Jumaa 4 года назад +1

    Better than my lecturer😢

  • @india5422xoxo
    @india5422xoxo 6 лет назад +7

    Love how he says for AS students and yet now it’s for GCSE students as well 🤦‍♀️

  • @mahamaha-lr4xy
    @mahamaha-lr4xy 8 лет назад

    i have a qs in my mind what is the significance of counter current flow i mean why oxygen decrease

  • @shaleena3604
    @shaleena3604 9 лет назад +1

    Really good videos, they're extremely helpful!!!! If possible could you make a video on the different immunological techniques? :)

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад

      Shaleen A Thanks for the kind words; doubt I'll manage any immunology vids before the exam I'm afraid!

    • @shaleena3604
      @shaleena3604 9 лет назад +1

      Mr Pollock it's okay I understand :)

  • @shwetharamballi6422
    @shwetharamballi6422 6 лет назад

    Is it possible if you can do a video on gas exchange in an earthworm?

  • @hassanali-mw2hu
    @hassanali-mw2hu 5 лет назад

    excellent teaching sir

  • @Namilanzi
    @Namilanzi 8 лет назад

    Thank you so much, super helpful!

  • @reubenbomb78
    @reubenbomb78 3 года назад +1

    Thank you !

  • @belenalvarez2314
    @belenalvarez2314 5 лет назад +1

    pollock... get it?

  • @Marshmallow635
    @Marshmallow635 9 лет назад +1

    Great videos!! Really helpful especially now since exams are coming up! :) I was wondering if you could also make a video on Protein Synthesis? I find that topic really confusing :s

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад +1

      Will put protein synthesis on the list...thanks for the kind words

    • @Marshmallow635
      @Marshmallow635 9 лет назад +1

      Thank you so much! :)

  • @krishnavenis1889
    @krishnavenis1889 6 лет назад

    It's ec 2 undrstnd d topic countercurrent flow after watching Ur video

  • @م.ش-غ4غ
    @م.ش-غ4غ 3 года назад +1

    Clear thanks

  • @rakib567
    @rakib567 9 лет назад +1

    Best A-level Biology videos on the internet. Can you make a video on the 25 mark essay for BIOL5? you could go through some examples of good essays if you want. :D

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад +1

      A unit 5 essay mini-series may be in the works... Keep your eyes peeled.

    • @rakib567
      @rakib567 9 лет назад +1

      wow that was quick! awesome news i need something like that because there's not much in the textbooks about the 25 marker. hopefully it will be a mark grabber for me.

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад

      Hey look...some essay videos appeared on my channel!

  • @LizzieHeartsTMPrincessofHearts
    @LizzieHeartsTMPrincessofHearts 8 лет назад +1

    This saved me from being scolded by my science teacher XD

  • @plabanpratim5202
    @plabanpratim5202 9 лет назад +1

    it was useful. thnx

  • @mtigpx8924
    @mtigpx8924 2 года назад

    lifesaver much useful

  • @nabisahebnadaf442
    @nabisahebnadaf442 4 года назад +2

    Nice

  • @surpremier
    @surpremier 3 года назад +1

    i get it now!!

  • @A_phnan
    @A_phnan Год назад

    I really understood it thanks

  • @ammarkhan5888
    @ammarkhan5888 8 лет назад +1

    excellent,!,

  • @ayeshad5170
    @ayeshad5170 3 года назад +1

    Thank u sm

  • @VastusShire
    @VastusShire 8 лет назад +1

    thanks I obtained A+ for the 3rd term examination for bio XD

  • @Troubledsham
    @Troubledsham 5 лет назад

    but how do the exchanges actually happen from a biology stance? what allows oxygen to pass but not let water or blood flow in/out? is there microscopic holes that are big enough for gasses but small enough to hold in/out liquid? how does co2 or other gasses escape the blood to lower the total gas content for more(a water glass can dissolve salt, but not once it reaches a maximum percentage, same with gases. and how is oxygen specifically filtered and gases regulated to not get too much or too little of o and other gasses. Sorry to hammer you but none of the videos i find on the subject go into these things, and only talk about these common sense basics.

  • @ryhimereid3306
    @ryhimereid3306 9 лет назад

    Rastaspects. Easy to understand

  • @chloe8480
    @chloe8480 9 лет назад +18

    My teachers forcing me to watch this but thanks

    • @MrPollockBiology
      @MrPollockBiology  9 лет назад +14

      +Chloe Scott I hope you find it useful! Could be worse...could be exam questions homework (like mine got!)

    • @pixel4908
      @pixel4908 8 лет назад

      ME TOO

    • @Lia-in1ts
      @Lia-in1ts 8 лет назад

      I wish my professor would make me watch it....They included insect and fish physiology in this semester's human physiology and I'm trying to study for the exam in just 3 days! believe it can't get any worse....:P

  • @malumbokabamba1371
    @malumbokabamba1371 6 лет назад

    thank you

  • @shaikmahaboobshariff6746
    @shaikmahaboobshariff6746 4 года назад +1

    Super

  • @scarletjensons6345
    @scarletjensons6345 6 лет назад

    Thanks dude

  • @mahanavid135
    @mahanavid135 8 лет назад

    helpful...Saad

  • @Lachlan_2005
    @Lachlan_2005 Год назад

    Thanjk yiu

  • @no-one00
    @no-one00 7 лет назад

    this helps