| A | B |
|---|
| trachea | windpipe |
| pharynx | throat |
| vocal cords | two folds of connective tissue that stretch across the opening of the larnx |
| larynx | voice box |
| alveoli | tiny sacs of lung tissue specialized for the movement of gases between air and blood |
| lungs | main organs of the respitory system |
| bronchi | passages that direct air into the lungs |
| diaphragm | muscle located below the lungs |
| epiglottis | prevents food from entering the trachea |
| nose | warms and moistens air entering the respiratory system |
| emphysema | the walls between the alveoli within the lungs lose their ability to stretch and recoil |
| asthma | caused by chronically inflamed, hypersensitive bronchial passages that respond to many irritants |
| lung cancer | resistant to chemotherapy and radiation therapy |
