| A | B |
|---|
| skeletal system | made up of the 206 bones in your body |
| periosteum | tough, tight fitting membrane that covers the bone |
| cartilage | smooth, slippery, thick layer of tissue that covers the end of bones |
| joint | a place where two or more bones come together |
| ligament | a tough tissue that hold the bones together at the joint |
| muscle | an organ that can contract, relax, and provides the force to move your body |
| voluntary muscle | muscles that you are able to control |
| involuntary muscle | muscles that you can't control consciously |
| skeletal muscles | muscles that move bones |
| tendons | thick bands of tissue that attach to bones |
| Cardiac muscle | found only in the heart |
| Smooth muscle | found in your intestines, bladder, blood vessels and other internal organs |
| epidermis | outer, thinnest layer of your skin |
| melanin | pigment that protects your skin and gives it color |
| dermis | below the epidermis, contains blood vessels, nerves, muscles oil and sweat glands |
