1.the main respiratory organs located in the chest cavity
2.cartilaginous structure that contains the vocal cords
3.microscopic blood vessels that enable the exchange of gases
4.thin-walled sacs in the lungs where exchange of gases take place
5.main muscle used for breathing; it separates the chest cavity from the abdominal cavity

choices:
alveoli
bronchi
capillaries
diaphragm
larynx
epiglottis
ribs
lungs
traches
nasal cavity​