respiratory system

6. The throat.
10. paired, air-filled spaces located above and behind the nose within the midface, separated by a midline septum
11. branches of the bronchi; carry air in the lungs.
13. A serous membrane that covers the lungs and lines the thoracic cavity.
15. The exchange of carbon dioxide and oxygen between the tissue cells and the bloodstream
16. Voice box, located between the pharynx and trachea.
17. Leaf-shaped structure that closes over the larynx during swallowing.
18. The oropharynx is the middle section, located behind the oral cavity (mouth). This section receives both air from the nasopharynx and food and air from the mouth
20. Microscopic air sacs in the lungs

1. the exchange of oxygen and carbon dioxide between the lungs and bloodstream.
2. The expulsion of air from the lungs; breathing out air.
3. Organ of respiration located in the thoracic cavity.
4. Two main branches of the trachea; air tubes to and from the lungs.
5. Breathing in; taking air into the lungs.
7. Laryngopharynx is the bottom section of the pharynx.
8. Cells use of oxygen and nutrients to produce energy, water, and carbon dioxide.
9. The projection in the center of the face; the organ for smelling and breathing.
10. The nasopharynx is the upper portion, located behind the nasal cavities. The pharyngeal tonsils, or adenoids (lymphatic tissue), and the Eustachian tube (tube to middle ear) openings are in this section.
12. The process of taking in oxygen (inspiration) and expelling carbon dioxide (expiration) by way of the lungs and air passages.
14. Bony and cartilaginous partition that separates the nasal cavity into two sections.
19. Hairlike projections