Respuesta :

impawsitive

Answer:

The answer is Bone Marrow.

Explanation:

Red blood cells produced inside of your bones in the bone marrow live for about 120 days. Your bone marrow continually makes new red blood cells to replenish your supply.

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Answer: red blood cells are produced by erythropoietin which is a hormone produced primarily behind the kidneys.

Explanation:

they are also called erythrocytes or for short RBC