Question

how is blood formed
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Answer 1

Answer:

blood is formed from water and haemoglobin.

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Answer 2

Blood cells are made in the bone marrow. The bone marrow is the soft, spongy material in the center of the bones. It produces about 95% of the body's blood cells. Most of the adult body's bone marrow is in the pelvic bones, breast bone, and the bones of the spine.

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