EVERYDAY SCIENCE

Detailed explanation-1: -The normal time of RBC senescent (age-related) death in adults is approximately 110 to 120 days.

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) Red blood cells make up almost half of your blood. The lifespan of a red blood cell is around 120 days.

Detailed explanation-4: -Red cells have an average life span of about 120 days after which they are cleared by-phagocytosis by reticuloendothelial macrophages due to accumulated changes during their life span. Approximately 5 million erythrocytes (the average number per l) are removed from the circulation every second.

Detailed explanation-5: -As they mature in the bone marrow, they also lose their nucleus and organelles in order to increase space for oxygen. Due to this loss of a nucleus and other organelles, blood cells cannot repair themselves when damaged; this limits their lifespan to about 120 days.