Cardiovascular | Tunic Layers & Types of Capillaries
Ninja Nerd
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📚 Premium Notes & Illustrations for Blood Vessel Tunic Layers & Capillaries: https://www.ninjanerd.org/lecture/tun...
Ninja Nerds!
In this cardiovascular physiology lecture, Professor Zach Murphy breaks down the tunic layers of blood vessels and the three major types of capillaries, providing a structural and functional perspective essential for mastering vascular physiology and pathology.
We begin by examining the three tunics that make up the walls of most blood vessels: the tunica intima, tunica media, and tunica externa (adventitia). You’ll learn how each layer contributes to vessel strength, elasticity, contractility, and resistance—and how their composition varies between arteries, veins, and arterioles.
Next, we explore the three types of capillaries—continuous, fenestrated, and sinusoidal—and their unique roles in tissue-specific permeability. Zach walks you through where each type is found, how they function in fluid and solute exchange, and what makes them suited to specialized organs like the brain, kidneys, intestines, and liver.
Enjoy the lecture and support us below!
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20 Comments
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 didn't study physiology very well because I didn't like it initially. But professor Zach made it sooooo simple.🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼
Lots of love from Bangladesh.
(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
Thanks!!!
Cardiovascular | Tunic Layers & Types of Capillaries
Ninja Nerd
308,635 views
📚 Premium Notes & Illustrations for Blood Vessel Tunic Layers & Capillaries: https://www.ninjanerd.org/lecture/tun...
Ninja Nerds!
In this cardiovascular physiology lecture, Professor Zach Murphy breaks down the tunic layers of blood vessels and the three major types of capillaries, providing a structural and functional perspective essential for mastering vascular physiology and pathology.
We begin by examining the three tunics that make up the walls of most blood vessels: the tunica intima, tunica media, and tunica externa (adventitia). You’ll learn how each layer contributes to vessel strength, elasticity, contractility, and resistance—and how their composition varies between arteries, veins, and arterioles.
Next, we explore the three types of capillaries—continuous, fenestrated, and sinusoidal—and their unique roles in tissue-specific permeability. Zach walks you through where each type is found, how they function in fluid and solute exchange, and what makes them suited to specialized organs like the brain, kidneys, intestines, and liver.
Enjoy the lecture and support us below!
🌐 Official Links
Website: https://www.ninjanerd.org
Podcast: https://podcast.ninjanerd.org
Store: https://merch.ninjanerd.org
📱 Social Media
TikTok: ninjanerdlectures
Instagram: ninjanerdlectures
Facebook: ninjanerdlectures
https://x.com/ninjanerdsci/
LinkedIn: ninja-nerd
💬 Join Our Community
Discord: Discord: discord
#ninjanerd #typesofcapillaries #tuniclayers