Term
| five main types of blood vessels? |
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Definition
| arteries, arterioles, capillaries, venules and veins. |
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Term
| Wall of an artery is made up of what three layers? |
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Definition
| tunic intima, media, and externa. |
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Term
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Definition
| innermost coat,endothelium, internal elastic lamina (stretch,recoil), closest to lumen |
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Term
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Definition
| continuous layer of cells that line the inner surface of the entire CVS |
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Term
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Definition
| usually the thickest layer, and consists of elastic and smooth muscle fibers. |
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Term
| if an artery has high compliance it means what? |
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Definition
| their walls stretch easily or expand with out tearing in response to a small increase in pressure. |
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Term
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Definition
| composed of mainly elastic and collagen fibers |
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Term
| arteries that largest in diameter are |
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Definition
| elastic arteries, because tunic media contains a high proportion of elastic fibers. |
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Term
| elastic arteries functions? |
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Definition
help propel blood while heart is relaxing
(ex, aorta, brachiophelic..) |
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Term
| arteries medium in diameter are? |
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Definition
| muscular arteries, their tunic media contains more smooth muscle and fewer elastic fibers |
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Term
| muscular arteries fuctions? |
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Definition
| greater vasoconstriction and vasodilation to adjust the rate of blood flow to various parts of the body. |
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Term
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Definition
| small branch of artery that delivers blood to capillaries |
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Term
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Definition
| miroscopic vessels that connect aterioles to venules |
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Term
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Definition
| the flow of blood from arterioles to venules through capillaries is called; |
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Term
| what vessel has a high metabolic requirement? |
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Definition
| capillaries, extensive networks |
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Term
| capillaries are absent in a few tissues |
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Definition
| cornea and lens of eye and cartilage |
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Term
| capillary walls consist of what? |
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Definition
| a single layer of basement membrane and endothelial cells |
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Term
| capillaries do not contain either of these |
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Definition
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Term
| blood exchange only occurs between what in capillaries? |
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Definition
| the walls of capillaries and the beginning of venules |
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Term
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Definition
| vessel that emerges from atriole and supplies a group of 10-100 capillaries (capillary bed) |
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Term
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Definition
| place where oxygen and nutrients cross to cells |
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Term
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Definition
| carbon dioxide and metabolic waste products cross into blood |
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Term
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Definition
| emerge from metarteriole or arterioles |
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Term
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Definition
| controls flow of blood into true capillaries. |
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Term
| what are the three types of capillaries? |
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Definition
| continous,fenestrated, sinusoid capillaries. |
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Term
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Definition
| the plasma membranes of endothelial cells form continuous tube |
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Term
| continuous capillaries are found in? |
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Definition
| the skeletal and smooth muscle, the connective tissues, and the lungs |
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Term
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Definition
| plasma membranes of endothelial cells have many fenestrations (porrous) |
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Term
| fenestrated capillaries are found where? |
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Definition
| kidneys, villi of small intestine, |
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Term
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Definition
| endothelial have large fenestrations, incomplete and absent of basement membrane |
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Term
| sinusoids are found where? |
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Definition
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Term
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Definition
| when several capillaries unite they form small veins called; |
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Term
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Definition
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Term
| venules collect blood from capillaries and drain into ? |
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Definition
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Term
| small venules closest to capillaries contain? |
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Definition
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Term
| large venules closest to vein contain? |
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Definition
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Term
| veins are essentially made up of three coats same as arteries what are they? |
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Definition
| tunic intima, media, externa |
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Term
| tunic interna in veins are ____ than arteries |
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Definition
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Term
| tuni media of veins are much ____ than arteries |
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Definition
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Term
| tunic externa , ____ layer of vein |
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Definition
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Term
| veins lack an internal and external what? |
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Definition
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Term
| not made to withstand high pressure |
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Definition
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Term
| blood flow is slowest in what? |
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Definition
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