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Blood cells such as red cells, white cells and platelets are made in the bone marrow, found in the ribs, vertebrae, skull, sternum and hips. All blood cells come from their "parent" or "stem" cells. These cells are stimulated by growth factors and they differentiate and mature into different cell types, each with specialised function, carrying out specific job(s) required by the body. Under stress, these growth factors stimulate the production of more cells to meet the demands of the body. For example, when the body needs more oxygen, there is an increase in the production of red cells by the bone marrow. These red cells contain a specific oxygen-carrying molecule called haemoglobin which carries oxygen to tissue cells in our body. |
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