What is the function of red blood cells?

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Multiple Choice

What is the function of red blood cells?

Explanation:
Red blood cells are specialized to move oxygen around the body. They do this with haemoglobin, an iron-containing protein that binds to oxygen in the lungs to form oxyhaemoglobin. As blood reaches tissues where oxygen is needed, haemoglobin releases the oxygen so it can diffuse into cells. The red blood cells’ biconcave shape increases surface area for diffusion, and their lack of a nucleus in many mammals maximizes how much haemoglobin they can carry. This oxygen transport is their main job, unlike fighting infections (done by white blood cells), clotting (done by platelets), or carrying nutrients (primarily a job of plasma).

Red blood cells are specialized to move oxygen around the body. They do this with haemoglobin, an iron-containing protein that binds to oxygen in the lungs to form oxyhaemoglobin. As blood reaches tissues where oxygen is needed, haemoglobin releases the oxygen so it can diffuse into cells. The red blood cells’ biconcave shape increases surface area for diffusion, and their lack of a nucleus in many mammals maximizes how much haemoglobin they can carry. This oxygen transport is their main job, unlike fighting infections (done by white blood cells), clotting (done by platelets), or carrying nutrients (primarily a job of plasma).

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