Question

What is the normal lifespan of a red blood cell?

1) 120 days
2) 1 year
3) 10 years
4) lifetime

Answer 1

Red blood cells, or erythrocytes, have an average lifespan of 120 days in the circulation before being removed by macrophages in the liver and spleen.

Step-by-step explanation:

Red blood cells, also known as erythrocytes, have an average lifespan of 120 days in the circulation. After this time, they are removed by macrophages, a type of white blood cell, primarily in the liver and spleen. The components of the degraded red blood cells' hemoglobin are then further processed.