MICROANATOMY

Detailed explanation-1: -The soft bone marrow, which is found inside many bones, makes most of the body’s red blood cells, white blood cells, and platelets.

Detailed explanation-2: -Bone is made up of compact tissue (the hard, outer layer) and cancellous tissue (the spongy, inner layer that contains red marrow). Bone tissue is maintained by bone-forming cells called osteoblasts and cells that break down bone called osteoclasts.

Detailed explanation-3: -Compact bone (or cortical bone) forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. It provides protection and strength to bones.

Detailed explanation-4: -Lining the inside of the bone adjacent to the medullary cavity is a layer of bone cells called the endosteum (endo-= “inside”; osteo-= “bone”).

Detailed explanation-5: -Inside bones there is a supporting structure with interconnecting bony plates and rods called trabeculae. This structure is called trabecular or spongy bone because it looks a bit like sponge. Bone marrow is found in the “holes” of the spongy bone. Many of the bones contain red bone marrow at birth.