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What Do Red Blood Cells Do? Red blood cells carry oxygen and nutrients to the tissues within the body and take away carbon dioxide. They're also known as erythrocytes. They get their purple coloration from a pigment referred to as hemoglobin, and it is the hemoglobin that truly carries the oxygen and carbon dioxide. Red blood cells are made within the bone marrow. A purple blood cell begins as a round cell with a round nucleus, and as this cell grows contained in the bone marrow, it picks up hemoglobin. Finally, when the purple blood cell is mature, it sheds the nucleus, leaves the marrow and enters the bloodstream. The lack of a nucleus is one factor that makes a red blood cell totally different from different mature cells. It has an indented center and is ready to deform itself enough to squeeze by capillaries. A crimson blood cell is energetic for about four months. After this time, it leaves the circulatory system and the body destroys it in the spleen, liver, bone marrow and blood vessels. To substitute these destroyed cells, the body has to create about two million red blood cells every second. Every cubic millimeter of a man’s blood accommodates about 5.2 million purple blood cells. The corresponding depend for women is about 4.6 million.
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