Across
- 2. Voice box; has two vocal cords which vibrate to produce your voice.
- 4. Presence of its rings saves air passage from collapsing
Down
- 1. Base of the lungs, large muscle that relaxes and contracts to allow air to rush in and to be pushed out to the lungs.
- 3. Tiny air sacs in the lungs
- 5. Organ that exchanges oxygen and carbon dioxide in the bloods.