Structure of Microcirculation and Capillary System

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Structure of Microcirculation and Capillary System:
Microcirculation as per the name is made up of small blood vessels, starting from arteriole to venules. Its this place where the exchange of substances between blood and tissue happens. The arteriolar smooth muscles are innervated. Metarterioles and precapillary sphincters respond to changes in local condition. Capillary wall is made up of a single layer of endothelial cells and basement membrane. To allow the passage of substances, there are gaps between the endothelial cells called intercellular clefts. Fluid can also cross the endothelial cell by transcytosis or through trans-endothelial channel. Variation in this general structure is seen in different organs, depending on their specific needs. Broadly the types of capillaries are continuous, fenestrated, and sinusoidal, with increasing permeability in this order. That's all for the structure of the microcirculation and capillary system.

Chapters:
00:00 Intro
00:18 Mircrocirculation
00:46 Structure of Microcirculation
01:11 Arteriole
01:32 Precapillary Sphincter
01:52 Metarteriole
02:38 Capillary Structure & Types
04:57 Continuous Capillary
05:40 Fenestrated Capillary
06:04 Sinusoidal Capillary
06:29 Venule
06:56 Summary
08:02 Bonus Point

Dr Vipul Navadiya
Nonstop Neuron
Medical Animation
Medical Animation Videos
Physiology

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