Across
- 3. Tiny blood vessels responsible for the exchange of oxygen and nutrients
- 6. The tube that connected throat to the lungs
- 8. a muscular organ that pumps blood throughout the body
- 9. The organ responsible for making bile juice
- 10. The process of blood returning to the heart
- 11. These are the main organs of the respiratory system
Down
- 1. flap of tissue that prevents food from entering the food pipe
- 2. The process of inhaling oxygen and exhaling carbon dioxide
- 4. Blood vessels that carry oxygenated blood away from heart
- 5. This system includes the mouth, stomach and intestines
- 7. The body's largest artery