The red blood cells are produced in the red bone marrow in the center of the bone.Marrow.Red blood cells, or erythrocytes, are made in the bone marrow as are white blood cells or leukocytes and they originate from stem cells. The marrow is located in the length of the long bones until we get older, then it will diminish with age. As we age the marrow is predominantly in the sternum or breastbone, the iliac crest or the hip bone of the pelvis, and in the vertebrae of the spine. The ends of the long bones or epiphysises are solid bone covered with cartilage for the strength needed for the movable joints.marrow