SI Notes

SI Notes - Atrial systole and ventricular diastole lasts .1...

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SI Notes  04/11/2007 20:00:00 Circulatory Transport nutrients, remove waste Insects Single heart, no atria, ventricles, veins, arteries Flow through openings mixes with interstitial fluid  called hemolymph Fish 2-chambered heart page 1047 Amphibians 3-chambered heart page 1048 4-chambered heart mammals, birds page 1050 cardiac muscle striated gaps in muscle intercalated disks  gap junctions and desmosomes sinoatrial node, pacemaker, page 1053 Diastole- relaxation, filling up with blood
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Systole- contraction, expelling blood Whole heart cycle lasts .8 seconds Atrial and ventricular Diastole lasts .4 seconds
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Unformatted text preview: Atrial systole and ventricular diastole lasts .1 seconds Ventricular systole and atrial diastole lasts .3 seconds EKG page 1054 Arteries page 1058 Veins have valves myogenic sphincters body knows where to send blood in situations capillary exchange Interstitial fluid and tissue 25% diffusion 75% bulk flow- movement based on pressure small hydrophilic molecules go out through pores in capillaries (1 cell thick) pressure becomes less along the way pressure in interstitial fluid increases, waste comes in to capillaries...
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SI Notes - Atrial systole and ventricular diastole lasts .1...

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