Average life span of human Red Blood Cells (RBC) is

Correct option is C

Ans. (c)
The average life span of human Red Blood Cells (RBCs) is approximately 120 days. RBCs transport oxygen from the lungs to body tissues and return carbon dioxide to the lungs.
Information Booster
1. RBCs are produced in the bone marrow.
2. Their biconcave shape maximizes oxygen transport efficiency.
3. RBCs lack a nucleus to accommodate more hemoglobin.
4. After 120 days, old RBCs are removed by the spleen (the "graveyard of RBCs").
Additional Knowledge
· 40 days (Option a): Incorrect, much shorter than actual lifespan.
· 80 days (Option b): Incorrect, underestimates lifespan.
· 120 days (Option c - Correct Answer): Average life span of RBCs in humans.
· 160 days (Option d): Longer than the actual lifespan.