| Question | Answer |
|---|---|
| bone marrow | a gel-like substance that fills the cavity inside a bone; the bone marrow is a living part of the bone where blood cells are made |
| cardiac muscle | type of muscle tissue found only in the heart |
| cartilage | soft flexible tissue (tip of our nose and outer ears are made of this) |
| compact bone | the thick outer layer of bones |
| endoskeleton | skeleton on the inside of the body |
| exoskeleton | skeleton on the outside of the body |
| involuntary muscle | muscles that function without one's control |
| joints | where two or more bones meet and are held together |
| ligaments | strong bands of tissue that hold bones together at a joint |
| muscular system | the system that handles movement of body parts |
| skeletal muscle | type of muscle tissue that moves our bones |
| skeletal system | system of bones and cartilage that supports the body |
| smooth muscle | type of muscle tissue found in many internal organs |
| spongy bone | hard bone filled with many openings; it is found near the end of many bones |
| tendons | tough, connective tissues that attach muscle to bone |
| voluntary muscles | muscles that you can control |
