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5 Cards in this Set
- Front
- Back
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1. List & give the defining characteristics of 3 layers comprising the vascular walls of arteries & veins (deep to superficial) |
tunica intima: endothelium, selctive permeable barrier, what goes in/out tunica media: made of smooth muscle and elastic fibers tunica externa: made of CT, collagen & elastic fibers |
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2.Arteries can be classified into 3 types: elastic muscular or arteriole. BRIEFLY define each type. What is the defining wall layer here?
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elastic: biggest artery, (aorta), elastic tissue called internal elastic lamina muscular:branches, smaller, 40 layers smooth muscle, brachial, femoral, renal arteriole: 25 layers smooth muscle & little elastic |
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3. What functions do capillaries serve? |
rapid diffusion of O2 and nutrients??, thin walls(single cell layer) make it easy |
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4. Veins are not classified by wall characteristics but by what factor? |
ANSWER 4 |
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5. Describe the main structural differences that distinguish arterial from venous vessels. |
valves?? tunica media is thicker in arteries than veins b/c of heavy blood flow, larger lumen in veins |
