Across
- 1. the upper part of the windpipe or trachea; it modulates the voice in speaking and singing
- 4. one of the cartilages of the larynx that covers the glottis when food or drink is passing into the stomach to prevent it from entering the larynx
- 5. small extending branches of the bronchus through which air reaches the alveoli
- 6. the aperture in the head of a human by which he receives food
- 8. the midriff; a muscle separating the thorax from the abdomen
- 10. the windpipe; joins the pharynx and the bronchi
- 11. a thin membrane, affixed to the lungs and covering the interior of the thoracic cavity
Down
- 1. the organ of respiration; humans have two
- 2. the passages of the nose through which air is inhaled and exhaled
- 3. the cavity of the nose, lined with cilia
- 5. one of the two branches of the trachea through which air flows
- 7. the passage joining the nasal cavity and the esophagus through which food and air flow
- 9. microscopic sacs in which oxygen and carbon dioxide are exchanged