respiratory

2. The two main tubes that branch from the trachea and lead to each lung.
5. Also known as the windpipe, it carries air from the throat to the lungs.
7. Tiny branches inside the lungs that carry air to the alveoli.
9. A muscle beneath the lungs that helps with breathing by contracting and relaxing.
11. The gas you breathe in that your body needs to survive.
13. The pair of spongy organs responsible for breathing in oxygen and exhaling carbon dioxide.

1. The waste gas your body exhales after using oxygen.
3. An alternate entry point for air when breathing, especially during exercise.
4. Also called the voice box, it helps produce sound.
6. The process of breathing in oxygen and exhaling carbon dioxide.
8. The part of the throat that connects the nose and mouth to the trachea.
10. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged with the blood.
12. The part of your face where air enters and is filtered before reaching the lungs.