Respiratory System
Across
- 3. Muscle between the lungs and stomach that is used when you breathe.
- 4. The inhaling of oxygen and exhaling of carbon dioxide.
- 6. Breathing organs located in the chest cavity.
- 7. To breathe in.
- 8. The process of taking air into the lungs and then releasing it.
- 9. A waste gas that leaves our bodies when we exhale is ____________ dioxide.
Down
- 1. To breathe out.
- 2. Tiny hairs that protect the respiratory tract from dust and other particles.
- 5. The organs involved in breathing is the ____________ system.