Across
- 2. A structure that is composed of different types of tissue
- 5. The levels of ___________ in the human body consist of cells, tissues, organs and organ systems.
- 6. A ______ is a group of similar cells that preform the same function.
- 7. The reaction of your body and mind to threatening disturbing or challenging events.
- 8. The smallest unit in the body.
- 9. The ________ system is the internal frame work of the body.
Down
- 1. __________ gives you a burst of energy that causes many other changes in your body. These changes prepare you to take quick action.
- 3. The largest unit in the body.
- 4. The process by which an organism's internal environment is kept stable in spite of changes in the external environment.