Across
- 1. The main organ in respiratory system
- 4. The left lung is ... than the right lung
- 5. The first part of digestive system
- 7. To take care of our health, we must drink plenty of ...2
Down
- 2. Air enters our respiratory system through ...
- 3. The circulatory system carries ... to all of our body.
- 6. ... pumps blood continuously to the whole body.