List AND briefly define the human body’s organization levels from smallest to la

1. chemical level: a. atoms are the basic building blocks of matter, b. molecules are units formed by atoms combining

2. cellular level: cells are the smallest living unit in living organisms

3. tissue level: tissues are groupings of cells performing a common function

4. organ level: an organ is a structure consisting of two or more tissue types

5. organ system level: an organ system describes a group of organs functioning cooperatively for a common purpose

6. organism level: a human organism consists of all of the organ systems of the body working together to promote healthy functioning (homeostasis)