Outline definition, the line by which a figure or object is defined or bounded; contour. See more.
There are three special types of cells that are found only in the bone. These cell names all start with OSTEO because that is the Greek word for bone. OSTEOCLASTS are large cells that dissolve the bone. They come from the bone marrow and are related to white blood cells.
Mature bone contains some osteoblasts, which build new bone, and cells called osteoclasts, which break down bone minerals. These cells enable the repair of broken or damaged bones and keep bone from becoming brittle and weak. Joints are classified into three types: Immovable, or fixed, joints allow no movement.