Circulation

Circulation - Chapter 38 Circulation Opened vs closed...

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Chapter 38 Circulation
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Opened vs. closed circulatory system
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Closed circulatory systems vary among vertebrates - higher metabolism, more complex circulatory system
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A very simple circuit Arteries carry blood away from the heart Veins carry blood toward the heart Blood enters the heart into the atria Blood leaves the heart from the ventricles Ventricles → arteries → capillaries → veins → atria → ventricles → arteries → capillaries → veins → atria → ventricles → ….
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Mammalian cardiovascular system – there are actually 2 atria, 2 ventricles and 2 vascular circuits
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The heart – our cardiac muscle Atrioventricular valves Semilunar valves
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Heart function Systol – contraction Diastol – relaxed Cardiac cycle – full round of emptying and filling Cardiac output – amount of blood pumped to systemic circuit = heart rate X stroke volume a myogenic heart – sinoatrial and atrioventricular nodes control the beat
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This note was uploaded on 04/22/2008 for the course EBIO 1040 taught by Professor Didomenico during the Spring '08 term at Colorado.

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Circulation - Chapter 38 Circulation Opened vs closed...

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