Human heart pumps $$70$$ cc of blood at each beat against a pressure of $$125$$ mm of Hg. If the pulse frequency is $$72$$ per minute, the power of the heart is nearly

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p $$=$$ pressure against which heart is pumping blood $$=$$ p.g.h $$=$$ $$13.6$$ x $$103$$ x $$10$$ x $$125$$ x $$10-3$$ $$N/m2$$ ⇒$$17$$,$$000$$ $$N/m2$$.If A be the effective area of flow of blood, then resistive force F $$=$$ p.A. If v be the average velocity of flow of blood, then power $$=$$ Fv $$=$$ pAv $$=$$ p x (Av) $$=$$ p x $$Q=$$ $$17$$ x $$103$$ x $$70$$ x $$10-6W$$ $$=$$ $$1.2W$$

Human heart pumps 70 cc of blood at each beat against a pressure of 125 mm of Hg. If the pulse frequency is 72 per minute, the power of the heart is nearly

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