Respiratory System

3. Part of the brain stem containing the VRG and DRG respiratory control centers
4. Cartilage in the trachea is U-shaped to allow movement of the
5. The most important stimulus for breathing
7. The additional amount of air that can be consciously inhaled
8. Diaphragm relaxes, rib cage decreases in size, increasing the pressure in the lungs and causing air to rush out
9. The amount of air remaining in the lungs after forced expiration
11. Contracts to expand the rib cage, causing inspiration
12. Indentation in the left lung for the heart to sit
14. Keeps the airway open in the trachea
15. Warms and moistens incoming air and traps foreign objects
16. Contains respiratory centers which modify the timing and smooth control of breathing

1. Formed when CO2 in blood mixes with water, makes the blood acidic
2. Tiny air sacs which, with capillaries, make up the respiratory zone
4. The additional amount of air that can be consciously exhaled
6. The amount of air exchanged by lungs at rest
10. Short section of cartilage that connects the pharynx to the trachea
13. Diaphragm contracts, rib cage increases in size, decreasing the pressure in the lungs and causing air to rush in
14. Increases surface area in the nasal cavity and create air turbulence