Across
- 2. organ of the circulatory system
- 3. unit of life
- 8. system that branches into the lungs
- 10. responsible for detecting and responding to stimuli
Down
- 1. of the brain responsible for consciousness and thought
- 4. that pumps blood throughout the body
- 5. organ in the body
- 6. outer layer of bones
- 7. by which food is broken down and absorbed by the body
- 9. of the nervous system responsible for voluntary movement
- 11. responsible for oxygen exchange in the body