Across
- 4. _______ system is responsible for our body's exchange of gases with the surroundings
- 5. This organ pumps blood to all parts of our body
- 7. This gas enters our blood in our lungs
- 8. _________ blood is transported from our heart to our legs
- 10. This organ exchanges gases with the surroundings
Down
- 1. This organ connects the nose to our lungs
- 2. Our bodies take in oxygen and release ________________
- 3. _______ system is responsible for transporting oxygen, digested food and waste materials all over our body
- 6. _________ blood is transported from our heart to our lungs
- 9. In fishes, exchange of gases takes place here