| A | B |
|---|
| epidermis | outer, thinnest layer of your skin |
| periosteum | the tough, tight-fitting membrane covering the bone's surface |
| joint | any place where two or more bones come together |
| voluntary muscles | muscles you are able to control |
| leg muscle | this is a voluntary muscle |
| muscle | an organ that can relax, contract, and provide force to move your body parts |
| functions of the skin | protects and eliminates body waste |
| skeletal muscles | muscles that move bones |
| heart | cardiac muscle |
| bruise | forms when capillaries rupture under the skin |
| hard, strong layer of bones | compact bone |
| patella | knee cap |
| function of the skeletal system | Blood vessels are formed in the marrow |
| deposits that the framework of compact bone contains | calcium phosphate |
| Spongy bone | found towards the end of long bones |
| the skeletal begins as this before birth | cartilage |
| osteoblast | build up bone by depositing calcium and phosphorus |
| osteoclast | break down bone tissue |
| pivot joint | allows little or no movement, bones in skull |
| gliding joint | part of a bone slides over another, wrists |
| hinge joint | back and forth movement, elbows |
| ball-and-socket joint | rounded end of one bone fits into a cuplike cavity, hips |
| the most common type of muscle | skeletal muscle |
| tendons | thick bands of tissue that attach muscle to bones |
| skeletal muscle | striated |
| smooth muscle | found in internal organs |
| muscles always | pull |
| melanin | protects your skin and gives it color |
| dermis | the middle layer of skin |
| helps your body absorb calcium | vitamin D |
| skin grafts | pieces of skin that are cut from one part of a person's own body |
