| A | B |
|---|
| homeostasis | maintenance of a constant internal state in a changing environment |
| tissue | group of similar cells that perform a common function |
| organ | collection of tissues that carry out a specialized function of the body |
| skeletal system | organ system whose primary function is to support and protect the body and to allow the body to move |
| marrow | soft tissue inside of bones |
| joint | place where two or more bones meet |
| ligaments | strong elastic bands of connective tissue |
| sprain | joint injury that happens when a ligament is stretched too far or torn |
| muscular system | organ system whose primary function is movement and flexibility |
| tendons | strands of tough connective tissue that connects your skeletal muscles to your bones |
| flexor | muscle that bends part of your body |
| extensor | muscle that straightens part of your body |
| integumentary system | organ system that forms a protective covering on the outside of your body |
| epidermis | surface layer of cells on a plant or animal |
| dermis | layer of skin below the epidermis |
