Question

In adult males heart pumps about 2,800,000 L of blood per year if his heart beats 70 times per minute how much blood does his heart pump with each beat

Answer 1

76.1 mL per beat

Explanation:

If we assume 365 days per year, the volume per beat is ...

`\frac{2.8* 10^6\,\text{L}}{\text{yr}}\cdot\frac{1\,\text{yr}}{365\,\text{day}}\cdot\frac{1\,\text{day}}{1440\,\text{min}}\cdot\frac{1\,\text{min}}{70\,\text{beat}}=\frac{28000\,\text{L}}{365\cdot 144\cdot 7\,\text{beat}}\\\\\approx 0.0761\,\text{L/beat}=76.1\,\text{mL/beat}`

His heart pumps about 76.1 mL per beat.