Across
- 2. Carries air to to the lungs.
- 6. Prevents food from going down the airway.
- 7. Tiny hairs that remove dust and other particles from inhaled air.
- 9. The respiratory organs.
Down
- 1. The mechanical action of getting air in and out of the lungs.
- 3. Tiny air sacs surrounded by blood vessels. The site of gaseous exchange.
- 4. Moisturises, purifies and cleans the air. Mucous and tiny hairs remove dust and other particles.
- 5. During inhalation, the intercostal muscles ___________, causing the ribs to move up and out.
- 7. Rings of _______________ keep the trachea open.
- 8. Also known as the voice box.