Science Chapter 14
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18 terms
Terms | Definitions |
|---|---|
 Skeletal System | a body system that contains bones as well as other structures that connect and protect the bones and that support other fuctions in the body. |
| cartilage | a stong, flexible tissue that covers the ends of the bones. |
| periosteum | membrane that surrounds the bone. |
| joint | where two or more bones meet. |
| ligament | tissue that connects bones to other bones. |
| arthritis | disease where joints become irritated ore inflammed, such as when cartilage in joints is damaged or wears away. |
| osteoporosis | bone disease that causes bones to weaken or become brittle. |
| muscle | strong body tissue that contracts in an orderly way. |
| skeletal muscle | type of muscle that attaches to bones. |
| voluntary muscle | muscle that you can conciously control. |
| cardiac muscle | muscle found only in the heart. |
| involuntary muscle | muscle you can not conciously control. |
| smooth muscle | involuntary muscle named for its smooth appearance. |
| integumentary system | the b ody system that includes all the external coverings of the body,including the skin nails, and hair. |
| epidermus | the outermost layer of the skin and the only layer in direct contact with the outside enviorment. |
| melanin | pigment that protects the body by absorbing some of the sun's damaging ultraviolent rays. |
| dermis | thick layer of skin the gives skin strength, nourishment and flexibility. |
| bruise | injury where blood vessels in the skin are broken, but the skin is not cut or opened. |
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