MICROANATOMY

Detailed explanation-1: -Normal human red blood cells have an average life span of about 120 days in the circulation after which they are engulfed by macrophages.

Detailed explanation-2: -Red blood cells have a limited lifespan because they don’t have a center membrane (nucleus). When a red blood cell travels through your blood vessels, it uses up its energy supply and only survives an average of 120 days.

Detailed explanation-3: -Red blood cells (erythrocytes) The lifespan of a red blood cell is around 120 days.

Detailed explanation-4: -The life of a red blood cell is short due to its lack of nucleus; human red blood cells only survive for about 120 days.

Detailed explanation-5: -Like all other blood cells, RBCs originate from red bone marrow. They have a lifespan of 120 days and after which they are degraded in the spleen.