Across
- 1. Dioxide The waste gas that is exhaled from the body
- 5. The process by which cells use oxygen to produce energy
- 7. A passage through which air is warmed and filtered
- 11. Tiny blood vessels surrounding the alveoli for gas exchange
- 12. The movement of air into and out of the lungs
Down
- 2. Tiny air sacs in the lungs where gas exchange occurs
- 3. Muscle that helps in breathing by contracting and relaxing
- 4. Gas that is absorbed into the blood from the lungs
- 6. Tube that carries air to the lungs, also called the windpipe
- 8. The process of taking air into the lungs
- 9. Organs where gas exchange occurs
- 10. Two main airways that branch from the trachea into the lungs