Across
- 3. Tube that delivers air from your mouth and nose to the trachea (windpipe.
- 7. Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
- 8. Small branches of the bronchial tubes that lead to the alveoli.
- 11. Blood vessels in the alveoli walls that move oxygen and carbon dioxide.
Down
- 1. Passage connecting your throat and lungs
- 2. Tissue flap at the entrance to the trachea that closes when you swallow to keep food and liquids out of your airway.
- 4. Tiny hairs that move in a wave-like motion to filter dust and other irritants out of your airways.
- 5. Hollow areas between the bones in your head that help regulate the temperature and humidity of the air you inhale.
- 6. Thin sacs that surround each lung lobe and separate your lungs from the chest wall.
- 9. Hollow organ that allows you to talk and make sounds when air moves in and out.
- 10. Muscle that helps your lungs pull in air and push it out.
- 12. Two organs that remove oxygen from the air and pass it into your blood.