Also known as capillary vessel, blood capillary, Capillary vessel, capillary, capillaries
A capillary is a small blood vessel, from 5 to 10 micrometres in diameter, and is part of the microcirculation system. Capillaries are microvessels and the smallest blood vessels in the body. They are composed of only the tunica intima (the innermost layer of an artery or vein), consisting of a thin wall of simple squamous endothelial cells. They are the site of the exchange of many substances from the surrounding interstitial fluid, and they convey blood from the smallest branches of the arteries (arterioles) to those of the veins (venules). Other substances which cross capillaries include wa
Capillaries are the tiniest blood vessels in your body, measuring just 5 to 10 micrometers across, and they form the final connection between arteries and veins. They matter because their extremely thin walls allow oxygen, nutrients, and other substances to pass between your blood and the surrounding tissues, making them essential for keeping your cells alive.
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