Skeletal System

Framework Protection Levers Production of blood cells Stores calcium, phosphorus, and fats

main trunk of body; skull, spinal column, ribs, and sternum

extremities; shoulder girdle, arm bones, pelvic girdle, and leg bones

create most red blood cells

stores fat

the tough, fibrous tissue that forms the outermost covering of bone.

is the dense, hard, and very strong bone that forms the protective outer layer of bones.

is lighter and not as strong as compact bone. This type of bone is commonly found in the ends and inner portions of long bones such as the femur. Red bone marrow is located here.

the central cavity located in the shaft of long bones where it is surrounded by compact bone. It is here that red and yellow bone marrow are stored. Medullary means pertaining to the inner section.

tissue that lines the medullary cavity

7 vertebrae

12 vertebrae

5 vertebrae