A. 112 days
B. 160 days
C. 120 days
D. 150 days
🧠 Explanation:
Red blood cells have a lifespan of about 120 days, after which they are replaced by new ones in the bone marrow. These cells carry oxygen from the lungs to the body, supporting vital functions. Their limited lifespan ensures efficient oxygen transport, making this a key topic in human physiology. It’s essential for medical students and health professionals studying blood disorders or anemia. Understanding this cycle also highlights the body’s renewal processes, engaging those interested in biology and health sciences, and emphasizing the importance of maintaining healthy blood cell production.
