Blood vessels
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Functions of blood vessels | Carry blood, regulate blood flow, regulate body temperature
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| Types of vessels | arteries, arterioles, capillaries, venules, veins
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| Systemic circulation | oxygenated blood from left ventricale, arteries, caplillaries, to tissues
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| Subdivisions of systemic circualtion | Coronary, cerebral, hepatic portal
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| Pulmonary circulation | Deoxygenated blood from right ventricle to lungs
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| Portal means | Blood travels through 2 sets of caps before reaching heart
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| 3 layers of arteries | t. externa, t. media, t. interna
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| Elastic artery | Largest; t. media-elastic fibers>smooth muscle
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| Muscular artery | T. media-smoot muscle>elastic fibers; regulate blood flow
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| Arterioles | Deliver blood to caplillaries
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| How does arterioles help in temperature regulation? | By vasocontricting (saves heat) or vasodialation (releases heat) of the arterioles near the skin
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| Capillaries | Only have endothelium and basement membrane - three types
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| Three types of capillaries | continuous, fenestrated, sinusoids
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| Continuous capillaries | Only gaps are between neighboring cells, and are the most common
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| Fenestrated capillaries | Plasma membrane has holes. In kidneys, sm. intestine, and some glands.
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| Sinusoids | Very large openings, incomplete basement membrane so proteins and cells can pass through. Found in liver and spleen.
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| Veins | T. interna, and t. media very thin and t. externa very thick - not stretchy
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| Venules | Recieves blood from capillaries and drains the blood into veins. No t. externa and very thin walls
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| Where is most of the blood in the body at any given time? | In the veins and venules
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Created by:
Kayerenee