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15 Cards in this Set
- Front
- Back
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where are elastic arteries located? |
They are thick walled arteries near the heart, the aorta and its major branches. |
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Why are arteries sometimes called conducting arteries? |
Their large lumens make them low resistance pathways that conduct blood from the heart to medium sized arteries. |
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Which vessel tunic contains the most elastin? |
The tunica media |
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what are elastic arteries like in terms of function? |
They can be visualized as simple elastic tubes |
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What is the purpose of elastic arteries? |
They are pressure reservoirs, expanding and relaxing as the heart ejects blood. |
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what do the elastic arteries give way to distally? |
The muscular arteries |
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What do the muscular arteries do? |
Deliver blood to specific body organs, and are sometimes called distributing arteries. |
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Which arteries have the thickest tunica media? |
Muscular arteries |
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what do muscular arteries have more of than elastic arteries? |
More smooth muscleh |
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What are muscular arteries more active in? |
vasoconstriction, do not stretch as much |
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What is on the face of each muscular artery? |
An elastic membrane |
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What are arterioles made of? |
Smaller arterioles are little more than a single layer of smooth muscle cells spiraling around the endothelial lining. |
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when arterioles constrict what happens? |
The tissues served are largely bypassed |
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Which blood vessels are the smallest? |
The capillaries |
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What do the walls of the capillaries consist of? |
A thin tunica intima |
