| A | B |
|---|
| homeostasis | process which keeps the delicate balance between activities in the body and outside the body |
| energy is for what? | to perform life activities |
| what is human body made of | cells |
| unicellular | made of one cell (ex. amoeba, bacteria) |
| multicellular | made of many cells |
| levels of organization | cells, tissues, organs, organ systems |
| tissue | group of similiar cells that performa a job (function) |
| muscle tissue | only kind of tissue that can contract (shorten/move) |
| connective tissue | tissue that provides support for the body and connects its parts (bones, blood, fat) |
| nerve tissue | carries messages back and forth between brain, spinal cord, and all parts |
| epithelial tissue | forms a protective surface on outside of body (skin, inside mouth, throat, etc) |
| organ | group of DIFFERENT tissues with a specific job (heart, stomach, etc) |
| organ system | group of organs working together to perform a specific job (digestion, circulation, etc) |
| how many organ systems are there? | 11 |
