Across
- 2. The smaller, terminal branches of the bronchial tubes that lead to the alveoli.
- 6. The windpipe that connects the larynx to the bronchi. It is lined with cartilage rings to keep the airway open.
- 7. Tiny, balloon-like air sacs at the end of the bronchioles where the exchange of oxygen and carbon dioxide with the blood takes place.
- 9. Two large tubes that branch from the trachea, carrying air into the right and left lungs. They further divide into smaller tubes.
- 11. The primary organs of respiration, located in the chest. They contain millions of alveoli and are protected by the rib cage.
Down
- 1. A large, dome-shaped muscle located at the base of the chest cavity. It contracts and flattens to draw air into the lungs, and relaxes to push air out.
- 3. A flap of tissue that covers the opening of the larynx to prevent food from entering the trachea during swallowing.
- 4. The throat, which serves as a shared passageway for both air and food.
- 5. A membrane that covers the lungs and lines the inside of the chest wall.
- 8. The voice box, containing the vocal cords for speech and sound production.
- 10. The primary entry point for air. It filters, warms, and humidifies inhaled air, trapping dust and germs with mucus and hairs.