Cardiovascular system anatomy

tubular structure which carries blood

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

semipermable membrane that separates blood and the brain

tubular vessels that are involved in the transport of lymph and lymphocytes

inner layer of blood vessel

complex of arteries and veins lying very close to each other, found in some vertebrates, mainly warm-blooded ones.

one capillary bed draining into another through veins

middle layer of blood vessel

outer layer of blood vessel

A precapillary sphincter is a band of smooth muscle that adjusts blood flow into capillaries mainly in the mesenteric microcirculation

venules in some lymphatic organs

hepatic sinusoidal

structure binding nerves and vessels