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7Sci CH7
7th Science CH7 Moving the Body
| Term | Definition |
|---|---|
| bone marrow | gel-like substance filling spaces within the bones |
| cardiac muscle | muscle found only in the heart; pumps blood through the heart and to the cells of the body by rhythmically relaxing and contracting |
| cartilage | rubbery material which first forms the skeletal system, later replaced by bone; cartilage also helps reduce bone-on-bone friction at joints |
| compact bone | hard, thick, outer bone layer in which compounds of calcium and phosphorus are concentrated; protects internal organs, supplies support and a place for muscle attachment |
| joint | places where two or more bones of the skeleton join; movable joints allow actions such as bending your legs; immovable joints do not allow motion and form the bones of the skull |
| ligament | strong bands of tissue that hold bones together; injury to ligaments can result in sprains |
| skeletal muscle | muscles that move bones; skeletal muscles work in pairs-when one skeletal muscle contracts, its partner relaxes |
| smooth muscle | moving food through your digestive system is an example of work done by smooth muscles; smooth muscle is found in many places inside your body, but you do not control its actions |
| spongy bone | inner bone layer containing many openings filled with bone marrow and tiny hard bone spikes made of minerals; found toward the ends of many compact bones; helps keep the skeleton lightweight and functions as shock absorber |
| tendon | elastic, strong tissue bands that attach skeletal muscles to bones at movable joints |
Created by:
djhockett5
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