Across
- 2. An increase depth and rate of ventilation to meet an increase in oxygen demand
- 4. A type of breath that requires the diaphragm to contract
- 5. Zone that provides a route for incoming and outgoing again
- 8. Part of the Upper Respiratory System
- 14. The parasympathetic system, vagus nerve X, causes this to occur
- 15. This gas is dropped off during external respiration
Down
- 1. This cavity must expand for inspiration to occur
- 3. The flow of blood into the pulmonary capillaries
- 6. The larynx is made up of three major pieces of this substance
- 7. Zone where the exchange of gasses between alveoli and lungs take place
- 9. Part of the pharynx directly behind the nasal cavity
- 10. Elastic cartilage that covers the opening of the trachea
- 11. Composed of the maxillary and palatine bones
- 12. Increase the surface area of the nasal cavity
- 13. Part of the Lower Respiratory System