Term
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Definition
* simple squamous endothelium
* contiuous with endocardium of the heart
* reduces friction between vessel walls and blood |
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Term
|
Definition
* controls vasodilation/constriction
* smooth muscle and sheets of elastin
* regulated by sympathetic nerves |
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Term
|
Definition
* protects, reinforces and anchors vessels to surrounding structures
* large woven collagen fibers
* in larger vessels: vaso vasorum is blood supply for the tunica externa (vessels of the vessels) |
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Term
| Elastic (Conducting) Arteries |
|
Definition
* contain large amounts of elastin
* largest in diameter
* able to withstand pressure
* expand and recoil passively to accomodate changes in blood volume. |
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Term
| Muscular (Distributing) Arteries |
|
Definition
* Deliver blood to specific organs
* have greatest proportion of tunica media
* have more smooth muscle in tunica media than elastin
* have elastic lamina on each face of tunica media |
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Term
| Arterioles (resistance vessels) |
|
Definition
* smallest arteris
* regulate blood flow into capillary beds through vasoconstriction/dilation
* determine amount of profusion to tissue |
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