How many times does a human heart beat during a person’s lifetime? How many gallons of blood does it pump? (Estimate that the heart pumps$\mathbf{50}\mathbf{}\mathit{c}{\mathit{m}}^{\mathbf{3}}$of blood with each beat.)

Here,

Heart is an organ which pumps blood from all parts of the body and makes the blood oxygenated.

Heart also act as pump.

It helps the blood to get decarbonized also.

N = Number of heartbeat per minute in a normal human

V= Volume of blood going to heart in each minute

As per the studies the number of heartbeat per minute in human is $84$to $94$.

Blood which is pumped into the heart is $50c{m}^3$.

A normal person lives for $80$years, than total number of heartbeat by that person will be

$$\begin{gathered} =80\times 365\times 24\times 60\times 84 \\ =3532032000 \end{gathered}$$

So the total number of beat a person beats in his life span of $80$years will be

It can be written in SI unit as $3.53\times {10}^8$.

The Total amount of blood pumped by the heart will be

50 x 3.53 x 108

=1.76 x 1011 cm3

If we want to convert cubic centimeter into gallon than we need to multiply the answer with $0.000264172$.

Hence

Blood pumped by heart in lifetime will be =1.76 x 10¹¹x 0.000264172

=4.665 x10⁷ gallons

Therefore heart pumps $4.655\times {10}^7$gallons of blood. Also the total number of beat a person beats in his life span of $80$ years will be 353203200.