Respiratory System

2. Passageway connecting the nose and mouth to the windpipe.
3. The main tube that carries air to the lungs.
4. The opening through which food enters the body.
6. The waste gas that is exhaled.
9. An organ in vertebrates through which food passes
12. The tubes that carry air in and out of the lungs
13. The act or process of breathing.
17. A leaf-shaped flap in the throat that prevents food and water from entering the trachea and the lungs.
19. The gas we need from the air to survive.
20. The opening between the vocal folds.
21. The process of exhaling or breathing out of the lungs.

1. A tiny branch of air tubes in the lungs.
5. A muscle that helps with breathing by contracting and relaxing to move air in and out.
7. This system, including the lungs and airways, facilitates gas exchange between the body and the environment.
8. An important organ, or. body part, for breathing and smelling.
10. The primary organs for gas exchange, where oxygen is taken in and carbon dioxide is released.
11. The mixture of gases we breathe.
14. The process of taking in and expelling air during breathing.
15. The area of the throat containing the vocal cords and used for breathing, swallowing, and talking.
16. Air-filled spaces within the bones of the face, specifically around the nose
18. The process of taking air into the lungs.