Question

How many times will a red blood cell circulate the body in its lifetime?

Answer 1

Around 250,000 times.

Answer 2

172800 times

Step-by-step explanation:

On an average time taken by erythrocytes or red blood cells is equal to 60 seconds.

The average life of red blood cells is equal to 120 days.

Now, number of circulations completed by a red blood cell is equal to total life time of the RBC divided by the time taken by RBC to complete one circulation.

Substituting the given values in mathematical equation, we get -

Total number of circulation
`= (120 * 24* 60* 60)/(60)\\= 120 * 24 * 60\\= 172800`