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5 Cards in this Set
- Front
- Back
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arteries: how many layers-and functions
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3
1st contains eleastic fibers 2nd or middle- contracts to regulate blood flow and blood presure 3rd-contains fiberouse conective tissue-and it becoms loose at its periphery |
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arterioles??
function?? |
small arteries
middle layer has some eleastic tissue bunt mainly composed of smooth muscle. if contracted or dialated affects blood pressure- the great the number of vessels dialated the lower the blood presure |
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capillaries???
function?? |
arteriols branch into capillaries
-exteamly narrow, microscopic tube- one cell thick wall exgange of oxygen, nutrients, glucose diffuses though there walls |
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capillary beds
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netwok of many capillaries
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when do capillaries open
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after eating-digestive capillaries- the muscle capillaries close
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