RESPIRATORY SYSTEM

2. – (11 letters) Overall process of gas exchange between the body and the environment.
3. – (6 letters) Structure containing the vocal cords; also known as the voice box.
4. – (11 letters) The mechanical process of moving air in and out of the lungs.
6. – (11 letters) Smaller airway branches that lead into the alveoli.
7. – (9 letters) Large dome-shaped muscle that contracts during inhalation.
10. – (7 letters) Tiny air sacs where oxygen and carbon dioxide are exchanged.
13. – (7 letters) Two large tubes that branch from the trachea into each lung.
14. - (5 letters) Traps the debris in the air.
15. CAVITY – (12 letters) Main external opening for the respiratory system; warms and filters air.

1. – (10 letters) Flap of tissue preventing food from entering the trachea.
5. – (7 letters) Passageway for both air and food located behind the nose and mouth.
8. – (6 letters) Double-layered membrane covering the lungs.
9. – (5 letters) Hair-like structures that filter and sweep mucus out of the airway.
11. – (5 letters) The main organs responsible for gas exchange in the body.
12. – (7 letters) The windpipe that connects the larynx to the bronchi.