Across
- 1. a deficiency of oxygen reaching the tissues of the body.
- 4. the modified upper part of the trachea of air-breathing vertebrates that in humans, most other mammals, and some amphibians and reptiles contains the vocal cor
- 5. normal respiration.
- 8. the act of drawing in air.
- 12. the act of pushing out air.
Down
- 2. a small air-containing compartment of the lungs in which the bronchioles terminate and from which respiratory gases are exchanged with the pulmonary capillaries.
- 3. the pair of openings of the nose or nasal cavity.
- 6. a thin plate of flexible cartilage in front of the glottis that folds back over and protects the glottis during swallowing.
- 7. Controlling your breathing.
- 9. the muscular tubular passage of the vertebrate digestive and respiratory tracts extending from the back of the nasal cavity and mouth to the esophagus.
- 10. the main trunk of the system of tubes by which air passes to and from the lungs in vertebrates.
- 11. either of the two primary divisions of the trachea that lead respectively into the right and the left lung.