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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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