| A | B |
|---|
| cell | basic unit of structure and function of a living thing |
| cell membrane | outer boundary of a cell |
| nucleus | control center of a cell |
| cytoplasm | jelly-like material inside a cell |
| tissue | group of similar cells that perform the same function |
| muscle tissue | contracts to make it move |
| nervous tissue | carries electrical impulses back and forth between the brain and parts of the body |
| connective tissue | provides support and connects all parts of body |
| epithelial tissue | covers the inside and outside of the body |
| organ | group of different types of tissue that performs a specific job |
| organ system | group of organs that work together to perform a major function |
| homeostasis | the process in which the body maintains an internal balance |
| stress | reaction of body to potentially threatening, challenging, or disturbing events |
| the levels of body organization | cells, tissues, organs, organ systems |
| function of cells | carry on processes that keep body alive |
| 4 basic types of tissue | muscle, nervous, connective, epithelial |
| way to cool body to maintain homeostasis | sweating |
| way to heat body to maintain homeostasis | shivering |
| adrenaline | chemical released when the body is stressed |
