Which portion of the respiratory system is held open by a series of C-shaped cartilages?

Which lung contains two lobes?

_______ is the process of breathing.

What is the function of cilia?

Where does gas exchange occur?

Where are the vocal cords located?

The epiglottis covers the _______ during swallowing to prevent food/liquids from entering into the lungs.

Alveoli are covered in ________, fatty substance that helps them from collapsing.

What is number one?

What is illustrated with #2?

Which portion of the pharynx is illustrated in green (#2)?

What muscle is located under the lungs and assists with lung expansion?

Which of the following breaths per minute is a normal respiratory rate?

During _______ the diaphragm contracts to enlarge the thoracic cavity to create a vacuum.