Bone Matrix: is organic proteinaceous part of bone in which calcium salts are deposited. It consists of collagen. Compact/Cortical Bone : is solid outer part of bone which is den sly packed with bone minerals. Spongy/Cancellous Bone: is miner softer part of bones having hollow spaces. Epiphysis: is the extreme portion of long bones which articulates with other bones. Diaphysis: is the middle main part (shaft) of long bone which provides rigidity to the bone. Metaphysis: is the part below epiphysis and diaphysis containing epiphysial cartilage. Periosteum : is outermost covering of bones which surrounds the bone from all over. Endosteum : is inner most lining of bones which is situated toward medullary cavity. Bone marrow: is soft tissue present in the medullary cavity of bones which is source of various blood cells. Epiphysial cartilage: is a cartilaginous covering present around epiphysis of long bones which is responsible for elongation of bones. Synovial membrane: is serous membrane lining synovial cavity which secretes synovial fluid.
Synovial fluid: is viscous fluid filled in the synovial joint. It provide frictionless, lubricating surface for the movement of joints.
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