1431cv7 - (demand • interventricular septum-electrical...

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7 Heart • Heart muscle - myocardium • striated muscle - contracts in similar fashion to skeletal muscle – heart contracts as a unit due to smooth conduction of electrical stimulus throughout • coronary circulation - extracts 80% of O 2 – increases circulation with increased work rate
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Unformatted text preview: (demand) • interventricular septum-electrical barrier between chambers • Atria -primer pumps - 70% flows directly into ventricles - atrial contractions forces remainder into ventricle...
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