Cardiac Cycle - Cardiac Cycle fish heart - replaced simple...

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Cardiac Cycle fish heart - replaced simple tubular hearts tube w/ 4 chambers o atrium/sinus venosus - 1st 2 chambers, for collection o ventricle/conus arteriosus - last 2 chambers, for pumping order of contraction - sinus venosus >> atrium >> ventricle >> conus arteriosus blood passes through gills after going through heart >> much of pressure from pumping lost amphibian/reptile heart - has 2 separate circulations due to lungs pulmonary circulation - between heart and lungs systemic circulation - between heart, rest of body allows for pumping fully oxygenated blood separated atriums prevent oxygenated/deoxygenated blood from mixing aorta - major artery of systemic circulation cutaneous respiration - breathing through the skin mammalian/bird hearts - 4 chambered heart w/ separate atria/ventricles right atrium receives deoxygenated blood >> right ventricle pumps blood to lungs left atrium receives oxygenated blood >> left ventricle pumps blood to body
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Cardiac Cycle - Cardiac Cycle fish heart - replaced simple...

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