Across
- 4. To move continuously or freely through a closed system
- 5. The gas that we inhale
- 7. The organ that moves food from the mouth to the stomach
- 8. The organ in the circulatory system that pumps blood
- 10. Process of nutrients moving into the body or cells (like a sponge)
- 12. The system that brings oxygen into the body and excretes carbon dioxide
Down
- 1. The muscle in the respiratory system that helps us breathe
- 2. The two organs in the respiratory system that hold air
- 3. The organ that is the first stage of the digestive system
- 4. The system that uses blood to transport nutrients and waste around the body
- 6. The system that breaks down food into nutrients
- 9. The organ that is the last stage of the digestive system
- 11. The gas that we exhale