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Is called bone marrow to the soft matter that is inside the bones . This organic substance appears as red marrow (which produces blood cells) and how yellow marrow (also called marrow ).

About 4% of an adult's body mass corresponds to the bone marrow. There are produced approximately 500,000 million red blood cells up to date.

In the red bone marrow the erythropoiesis : that is, the production of erythrocytes (red blood cells or red blood cells). By containing stem cells, it also generates the rest of the blood cells, such as platelets and the leukocytes . The yellow bone marrow , meanwhile, is an adipose organic tissue found in long bones.

It is important to mention that the bone marrow can be affected by diseases as the leukemia and the tuberculosis . Typically, to make a diagnosis, a sample of red bone marrow is removed with a needle that enters the iliac bone.

To regenerate the central nervous system it is possible to appeal to a bone marrow transplant . When there is compatibility between the donor and the recipient, bone marrow is removed from the donor (live) through a puncture and aspiration that is usually performed in the hip or the sternum. Said marrow is then transfused to the recipient.

It should be noted that the bone marrow should not be confused with spinal cord . A cord that is the continuation of the brain and that transmits nerve impulses to the spinal nerves is called the spinal cord.

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