Respiratory System

2. These smaller airways branch from the bronchi inside the lungs.
5. Air enters the body through this part and is filtered and warmed.
6. dioxide This waste gas is exhaled from the lungs.
8. The action of breathing air out of the lungs.
11. This process moves air in and out of the lungs.
14. Small blood vessels that surround the alveoli for gas exchange.
19. A term referring to the lungs or related structures.
20. A condition where the airways become inflamed, making it difficult to breathe.
21. This tube, often called the windpipe, carries air from the throat to the lungs.
22. The action of breathing air into the lungs.
23. The process of delivering oxygen to the blood.
24. Also known as the voice box, this structure helps you speak.

1. These are two main branches that lead air into each lung.
3. The process of gas exchange in the body.
4. These are the main organs of the respiratory system where oxygen is exchanged for carbon dioxide.
7. This gas is inhaled and used by the body to produce energy.
9. A flap of tissue that prevents food from entering the trachea.
10. The chest cavity where the lungs and heart are located.
12. Bones that protect the lungs and other chest organs.
13. This sticky substance traps dust and pathogens in the airways.
15. A thin membrane that surrounds and protects the lungs.
16. Tiny hair-like structures that move mucus out of the respiratory tract.
17. A large muscle under the lungs that helps with breathing.
18. A part of the throat that connects the mouth and nasal cavity to the trachea.
20. Tiny air sacs in the lungs where gas exchange happens.