what are red blood cells
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Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow. They typically live for about 120 days, and then they die.
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RBCs known as red blood cells or erythrocytes. RBCs are biconcave, disc - shaped cells. Unlike other cells, a mature RBC does not have any nucleus. This provides more space for haemoglobin while the biconcave shape increases surface area for more transportation of oxygen. RBCs are produced in the bone marrow. Their average life span is about 120 days. They are the most abundant components of blood. There are about 5 - 6 million RBCs in each mm3 of blood, which gets its colour from them. These are red in colour because of the presence of a red coloured iron - containing protein called haemoglobin. The haemoglobin carries oxygen in the pure blood from lungs to every cell in the body.
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