Bio nov5

Bio nov5 - OPEN CIRCULATORY SYSTEM fluid bathes the body...

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OPEN CIRCULATORY SYSTEM – fluid bathes the body tissues; sucked in and pumped out open system *One fluid – hemolymph *Insects -CLOSED CIRCULATORY SYSTEM (Us); blood separates from interstitial fluid *advantage; system from carrying a lot of different kinds of material kept separate *disadvantages; materials must cross walls of capillaries through interstitial fluid to get to where material exchanges take place (extra step) -overcome the disadvantage; capillaries have thin walls -2 CHAMBERED HEART – slow moving -3 CHAMBERED HEART – 2 atria and 1 ventricle, ventricle pumps forcefully to long and systemic=mixing of oxygenated and deoxygenated blood *speedy movement of blood (forceful pumping of blood) -Our circulatory system *heart, vessels, pulmonary circuit, systemic circuit *pulmonary and systemic circuit, continue it throughout the whole body -HEART *thicker walls on left side (stronger pumping) -Functioning relies on VALVES *between atrium and ventricle, have ATRIOVENTRICULAR VALVE -have tether to the walls of the ventricles that keep valves from flipping backwards when the
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This note was uploaded on 04/22/2008 for the course BIO 1305 taught by Professor Eldridge during the Fall '08 term at Baylor.

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Bio nov5 - OPEN CIRCULATORY SYSTEM fluid bathes the body...

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