Where is the red bone marrow located in the human skeleton?

Bone marrow is a soft, gelatinous tissue that fills the medullary cavities, the centers of the bones.

Red bone marrow is made up of thin, highly vascular fibrous tissue containing hematopoietic stem cells. These are hematopoietic stem cells.

Red bone marrow produces all the red blood cells and platelets in adults and about 60-70% of the lymphocytes. Other lymphocytes begin life in the red bone marrow and form entirely in lymph tissues, including the thymus, spleen, and lymph nodes.

Together with the liver and spleen, red bone marrow also plays a role in getting rid of old red blood cells. Most red blood cells, platelets, and most white blood cells are formed in the red bone marrow.