Across
- 3. large, flat muscle that helps with breathing
- 5. Helps with forming scabs
- 7. Upper chamber of the heart
- 8. Fights disease
- 9. a group of cells working together to perform a certain job
- 10. The smallest unit of life
- 11. Connects veins and arteries
- 13. Carries blood back to the heart
- 14. Where digestion begins
- 15. Hair-like structures in the small intestine that absorb nutrients
Down
- 1. is also known as the windpipe
- 2. a group of tissues working together to perform a certain job
- 4. Lower chamber of the heart
- 6. Liquid part of the blood
- 7. Carries blood away from the heart
- 12. Tiny sacs in the lungs were the gas exchange happens