Across
- 2. the main respiratory muscle that contracts and relaxes to allow air into the lungs.
- 5. During inhalation and exhalation, the lungs and blood exchange oxygen and carbon dioxide.
- 7. The trachea (windpipe) connects to the lungs via a wide airway.
- 8. a collection of organs and tissues that cooperate to allow you to breathe
Down
- 1. These air-filled gaps along the sides of the nose help to lighten the skull.
- 3. Food and air both pass through the ____ on their way to their final destinations. Speech is also influenced by the ____
- 4. the main airway to the lungs.
- 6. allows air to pass through