MICROANATOMY

Detailed explanation-1: -Inside the bone marrow, blood stem cells divide and mature to make new blood cells. During this process, the cells become either lymphocytes (a kind of white blood cell) or other blood-forming cells. These other blood-forming cells mature into red blood cells, white blood cells (other than lymphocytes), or platelets.

Detailed explanation-2: -Red bone marrow contains blood stem cells that can become red blood cells, white blood cells, or platelets.

Detailed explanation-3: -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.

Detailed explanation-4: -Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow are called hemocytoblasts. They give rise to all of the formed elements in blood.

Detailed explanation-5: -As the body ages, it gradually replaces the red bone marrow with yellow fat tissue. Adults have an average of about 2.6 kilograms (kg) (5.7 pounds) of bone marrow, about half of which is red. All other cancellous, or spongy, bones and central cavities of the long bones are filled with yellow bone marrow.