| A | B |
|---|
| Number of Bones in adult body | 206 |
| 5 functions of the skeletal system | framework, protection, levers, production of blood cells, storage |
| tough membrane around outside of bones | periosteum |
| membrane lining the medullary canal of a bone | endosteum |
| type of marrow that produces 3 types of blood cells | red marrow |
| type of marrow that consists mostly of fat cells | yellow marrow |
| hollow cavity inside bones | medullary cavity |
| the long shaft of a long bone | diaphysis |
| the end section of a long bone | epiphysis |
| the part of the skeleton made of the skull, spinal column, ribs, and breastbone | axial skeleton |
| the part of the skeleton made of the extremities, shoulder girdle, and pelvic girdle | appendicular skeleton |
| soft spots in the cranium | fontanels |
| areas of the cranium where bones joined together | sutures |
| air spaces in the bones of the skull | sinuses |
| areas where bones join together | joints |
| connective tissue bands holding bones together | ligaments |
| 2 freely moveable ball and sockets joints | shoulders and hips |
| 2 freely moveable hinge joints | knees and elbows |
| slightly movalbe joints | attachment of ribs to vertebrae |
| bone composed of immovable joints | cranium |
