Across
- 5. Air taken in is called _______ air
- 6. _____ food from digestive system is transported away by circulatory system
- 8. Carbon dioxide is an example of _______ materials transported away by the respiratory system
Down
- 1. ______ such as oxygen is transported by circulatory system to different parts of the body
- 2. Air given out is called _________ air
- 3. Fish take in oxygen dissolved in the water through their ______
- 4. The lungs are responsible for ______ of carbon dioxide from the body
- 7. Plants exchange gases with their surroundings through their _____ openings