What is the function of red blood cells in the circulatory system​

Red blood cells carry oxygen from our lungs to the rest of our body parts. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.

Explanation:

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Red blood cells carry oxygen from our lungs to the rest of our bodies.

Explanation:

The function of the red cell and its hemoglobin is to carry oxygen from the lungs or gills to all the body tissues and to carry carbon dioxide, a waste product of metabolism, to the lungs, where it's removed from the body. In invertebrates, oxygen-carrying pigment is carried free in the plasma; its concentration in red cells in vertebrates, so that oxygen and carbon dioxide are exchanged as gases, is more efficient and represents an important evolutionary development. The mammalian red cell is further adapted by lacking a nucleus—the amount of oxygen required by the cell for its own metabolism is thus very low, and most oxygen carried can be freed into the tissues.

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