Across
- 3. The main organ in the Respiratory system
- 4. The muscle at the bottom that moves up or down as you breathe in and out
- 6. The system that is how we breathe
- 7. There is a various number of these in the human body. They make up how we breathe or digest
Down
- 1. The muscle that contracts and expands
- 2. The bones that surrounds and protects the chest
- 5. A major organ in humans and animals that processes blood
- 8. The tunnel that the air moves down towards the lungs