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Across 1. inner membrane that touches the inside of the thoracic cavity (2 Words) 7. Where does the upper respiratory system terminate? 10. the thin serous membrane around the lungs and inner walls of the chest 11. includes the passageways from the nose to the terminal bronchioles (2 Words) 12. Amount of air that moves in and out of the lungs during a normal breath (2 Words) 13. lungs are located the (2 Words) 15. inner membrane that touches the lung (2 Words) 17. amount of air that can be exhaled after a normal tidal volume exhalation (3 Words) 18. the structures involved in gas exchange such as respiratory bronchioles and alveoli (2 Words) 19. most of the oxygen in the blood is transported by 20. where most carbon dioxide is stored in blood (2 Words) 21. part of the brain that is respiratory control center 22. the maximum amount of air that can be exhaled after a maximum inhalation (usually tested with a spirometer) (2 Words)

Down 2. Amount of air that can be forcefully inhaled after a normal tidal volume inhalation (3 Words) 3. Where does the lower respiratory system begin? 4. how many lobes in the right lung 5. the exchange of gases between the lungs and the blood (2 Words) 6. cartilaginous flap at the opening of the larynx that prevents entry of food into the lower respiratory system 8. the inhalation and exhalation of air between atmosphere and the lungs (2 Words) 9. the exchange of gases between blood and tissues (2 Words) 11. the primary stimulus for breathing is the concentration of (2 Words) 14. vital capacity plus residual volume (3 Words) 16. tiny air sacs in the lungs where the exchange of gases takes place 23. how many lobes in the left lung