| Term | Definition |
|---|
| cell | the basic unit of structure and function in a living thing |
| cell membrane | the outside boundary of the cell |
| nucleus | the control center of a cell;directs cell activities |
| cytoplasm | the material within a cell apart from the nucleus |
| tissue | a group of similar cells that perform the same function |
| muscle tissue | a body tissue that contracts or shortens, making body parts move |
| nervous tissue | body tissue that carries electrical messages back and forth between the brain and body |
| connective tissue | body tissue that provides support for the body and connects all its parts |
| epithelial tissue | body tissue that covers the surfaces of the body,inside and out |
| organ | structure in body that is composed of different kinds of tissue |
| organ system | group of organs that work together to perform a major function in body |
| homeostasis | organism's internal environment is kept stable |
| stress | reaction of body to potentially threatening,challenging,or disturbing events |
| skeleton | inner framework made up of all the bones of body |
| vertebrae | the 26 small bones that make up the backbone |
| joint | place in body where two bones come together |
| ligament | strong connective tissue more flexible than bone;protects the ends of bones |
| compact bone | hard,dense bone tissue |
| spongy bone | a layer of bone tissue having many small spaces |
| marrow | soft connective tissue that fills the internal spaces in bone |
| osteoporosis | condition in which body's bones become weak and break easily |
| cartilage | connective tissue more flexible than bone;protects the ends of bones |
Combine with other sets
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