What is the function of red blood cells in the human body
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Red blood cells (RBCs) are responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the body to the lungs for exhalation. Details:
Red blood cells, or erythrocytes, contain hemoglobin, a protein that binds to oxygen molecules. When we inhale, oxygen enters the lungs and binds to hemoglobin in the red blood cells, which then travel through the bloodstream to deliver oxygen to various tissues. After delivering oxygen, red blood cells pick up carbon dioxide, a waste product of cellular metabolism, and transport it back to the lungs, where it is expelled from the body. RBCs are produced in the bone marrow and have a lifespan of about 120 days.