What is the primary function of red blood cells in the human body?

Explanation

Red blood cells contain hemoglobin, an iron-rich protein that binds to oxygen in the lungs and carries it to tissues throughout the body, then picks up carbon dioxide to be exhaled. Their distinctive red color comes from hemoglobin, and their flexible, disc-like shape lets them squeeze through narrow capillaries. Unlike most cells, mature red blood cells lack a nucleus, which allows more room for hemoglobin. Explore more Everyday Science MCQs on mcqstutor to keep practicing.