Cardiovascular | Tunic Layers & Types of Capillaries
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- Опубликовано: 26 июл 2024
- Official Ninja Nerd Website: ninjanerd.org
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Join us in this video where we discuss the different types of capillaries, and the multiple tunic layers of blood vessels. We hope you enjoy this lecture and be sure to check out all of our social media pages and ways to support us below!
References:
● Tucker, W. D. (2021, August 11). Anatomy, Blood Vessels. U.S. National Library of Medicine. Retrieved September 10, 2021, from www.ncbi.nlm.nih.gov/books/NB....
● Torres-Vázquez, J., Kamei, M., & Weinstein, B. M. (2003). Molecular distinction between arteries and veins. Cell and Tissue Research, 314(1), 43-59. doi.org/10.1007/s00441-003-07...
● Le T, Bhushan V, Sochat M, Chavda Y, Zureick A. First Aid for the USMLE Step 1 2018. New York, NY: McGraw-Hill Medical; 2017
● Mancini MC. Heart Anatomy. In: Berger S Heart Anatomy. New York, NY: WebMD.emedicine.medscape.com/articl....
● Hill M. Cardiovascular System - Heart Histology. embryology.med.unsw.edu.au/em....
● Standring S. Gray's Anatomy: The Anatomical Basis of Clinical Practice. Elsevier Health Sciences; 2016
● Leslie P. Gartner, James L. Hiatt. Color Textbook of Histology. New York (NY): Grune & Stratton Inc.; 2006
● U. S. National Institutes of Health, National Cancer Institute. NIH SEER Training Modules - Classification & Structure of Blood Vessels. training.seer.cancer.gov/anat....
● Marieb EN, Hoehn K. Anatomy & Physiology. Hoboken, NJ: Pearson; 2020.
● Boron WF, Boulpaep EL. Medical Physiology.; 2017.
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Brief Table of Contents:
Arteries
- 0:40 Tunica Intima / Tunica Interna
- 1:40 - Internal Elastic Lamina
-- Marfan Syndrome
-- Ehlers-Danlos Syndrome
- 3:00 - Tunica Media
-- Sympathetic Innervation
4:20 - External Elastic Lamina
5:20 - Tunica Externa
-- Dense Irregular Connective Tissue
--Vasa Vasorum blood vessels nourish tunica externa
--- Tertiary Syphilis
7:35 - Veins (mostly the same layers as arteries with some different features)
- Elastic Lamina Differences if present
- 8:35 - Thinner Tunica Media
- 9:05 - Thick Tunica Externa
- Collapsed Lumen
10:25 - Capillaries
- 11:45 - Sinusoidal Capillary
-- Most Permeable
- 14:25 - Continuous Capillary
- 17:55 - Fenestrated Capillary
-- Medium intercellular clefts
-- Fenestration Pores
You may wish to add this to the description or create your own more detailed version. Thanks for these videos.
I just wanna say...THANK YOU. What I love the most about your lectures is the way you speak with such tranquility and enthusiasm at the same time. You are giving me the motivation to study and when I study from your lectures I feel more concentrated because you don't put any pressure. It's like you are talking about something ordinary without making big deal out of it and that is very helpful. I feel less stressed when I hear your voice saying internal elastic lamina. Once again, big thanks!
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Vein Structure: 7:36
(similar to Artery, but with differences in *thickness* of layers, due to *less pressure* )
Internal Elastic Lamina: very little or none: 8:00
Tunica Media: a lot thinner than in Artery: 8:38
Tunica Externa: *much thicker* than in artery (nearer the surface of body) : 9:05
This channel is an absolute blessing to me.
I didn't study physiology very well because I didn't like it initially. But professor Zach made it sooooo simple.🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼
Capillaries: three types: 10:30
Sinusoidal: 10:49 (details: *huge* intercellular *clefts* : 11:49)
Continuous: 11:01 (small clefts, & pericytes; no clefts & *tight junctions* in BBB : 14:27)
Fenestrated: 11:21 (medium size clefts, pores between cells?) 17:58
tqsm
@@sheikhmuhiittamimisalim84 tqsm = Telemetry Quality Status and Monitoring???? (or is tqsm a 'new' way of saying tysm = thank you so much? I don't understand text-speak very well. Or is it just a strange typo?)
Thank you so much😅
@@sheikhmuhiittamimisalim84 You're quite welcome! 😅
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His videos are the best.The way he explains everythings.... Everything becomes easy to learn and remember!!!
Wonderful explanation! Very clear.
Excellent Zach!
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EXCELLENT!!! You are mostly very easy to hear and understand!
These videos are the best!!! I watch them to study, and I watch them for fun (because I too am an anatomy nerd 😂).
Thanks!!!
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Man, I love you, this is really helpful
Artery Structure:
Endothelial cells: 0:50 subEndothelial layer: 0:54
Internal Elastic Lamina: 1:43
Smooth Muscle Cells: Tunica Media: 3:00
External Elastic Lamina: 4:24
Tunica Externa: Dense Irregular Connective Tissue: 5:21
Vasa Vasorum: 6:02
Capillaries: 10:30
Thank you!!! From DR🇩🇴
absolutely brilliant !
Soo helpful.... Thanks for this.
You are very knowledgeable and amazing. Thanks for sharing
Awesome video!!
Outstanding lecture
Triple gem bless you professor,............. This is a good service providing by u,...........love u from Sri Lanka
Awesome help. Thanks
what aguy ,what alecturer ,i simply impressed the way he teaches ...........please add more histology lecutre
Nicely explained ❤️
Thank you so so much for mentioning the Vasa Vasorum!!! I'd just learned about a 'quartet' of micro-anatomical structures, including it! Vasa Vasorum, Vasa Nervorum, Nervi Nervorum, and Nervi Vasorum.
Vasa Vasorum: en.wikipedia.org/wiki/Vasa_vasorum
Vasa Nervorum: en.wikipedia.org/wiki/Vasa_nervorum
Nervi Nervorum: www.merriam-webster.com/medical/nervi%20nervorum
Nervi Vasorum: en.wikipedia.org/wiki/Vascular_nerves
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Hi. Can you make a video about pharmacokinetics? It would be great to hear it from you because your lectures are awesome
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wait doesnt the continous capillaries have the intercelluar clefts?? and the sinosoid capillaries allow for slow flow of blood and have macrophages??
awesome
Have you looked into the Glycocalyx Structure and Mucosa lining that makes up the layers of the Endothelial cells.
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Your so friggin smart like I can’t even hardly keep up
u fucking idiot, its not hard, just drop out of school if u cant even keep up with this.
@@ayk2086 holy shizz dude, chill🤣🤣
Hello , my book says that the Tunica Externa is composed of Areolar CT. Is it possible that in some come vessel there is dense irregular ct, while in other vessels there is areolar ct? Or is it one of those things in biology that has yet to have solid backing so there's not a consensus as to which ct the tunica externa is composed of? ty
great job. but Sinusoidal
.cap. have discontinued basement membrane, the Continuous cap. have tight junction between them.
What is the significance of the internal and external elastic lamina? How are they different from the 3 main tunic layers?
what nourishes the vasa vasora?
A few questions:
1. Is the *internal elastic lamina* a part of the *tunica interna* ?
2. And can the *sub-endothelial layer* alternatively be termed the *basement membrane* ? And/or if basement membrane is a correct term, would it be more correctly said to be comprised of *both* the sub-endothelial layer *and* the internal elastic lamina?
3. And is the *external elastic lamina* a part of the tunica *media* , or of the tunica *externa* ?
4. At ~5:59, speaking about *dense irregular connective tissue* , the *closed captions* says, '...it's out as that neural arrangement...', but I suspect that's not what you said. What did you say?
Awwwww he was so mini
What's the difference between the intercellular clefts and the fenestration pores?
The books seldoms give a clearly distiction between the different types of capillaries, when they mention fenestrated and sinusoids capillaries interchangeably. This is confusing from time to time. (Even my professor at the medical faculty of Oslo says that capillaries in endocrine glands are both sinusoids and fenestrated). It's about time someone clear this up. Thanks a bunch.
+Nguyen Nguyen I am more than happy to help! I'm glad that our channel is helping you. That is our goal!!!!!
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Hi there sir
Is receptor are organ or not?
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Very beutiful
Is anyone else applying to PA school and super intimidated by the fact that this guy is a PA now? Like this is the level of person I'm competing with?? I feel doomed :(
It's not a competition Zach has tutoring experience and has backgrounds in biochemistry and neuroscience at master level. Seek out support from your classmates, lose the ego of competing with others and discuss your class content. You got this.
Why is the vein's Tunica Externa thicker than the artery's?
I don’t think he meant to make it look like that. If anything and artery would have a thinker tunica externa because of the high pressure.
I googled, and found, "The tunica externa is often thicker in veins to prevent collapse of the blood vessel and provide protection from damage *since veins may be superficially located.* I found that at: med.libretexts.org/Bookshelves/Anatomy_and_Physiology/Book%3A_Anatomy_and_Physiology_(Boundless)/18%3A_Cardiovascular_System%3A_Blood_Vessels/18.1%3A_Blood_Vessel_Structure_and_Function/18.1A%3A_Blood_Vessel_Structure
@@_jeezi5594 Your reasoning makes sense, but the fact is it's thicker & he did mean to make it show thicker. He didn't explain why that I heard, but I found, "The tunica externa is often thicker in veins to prevent collapse of the blood vessel and provide protection from damage since veins may be superficially located.".
D
öz abim
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G
Where is the tunica interna of the capillaries????????????
O
I mean my god he's so good looking its hard to concentrate....
not rlly..................hes an average guy
He is. I watched some of his other videos with no problems but this particular video has me very distracted 😅. I was scrolling through to see if anyone else was having this problem lol.
O