This anatomical structure separates the nasal cavity from the oral cavity (mouth). This allows humans to breathe and chew food at the same time. 

During inspiration, oxygen moves from the _____ to the _____. 

After a long, intense exercise, you may begin to breathe rapidly. This is referred to as hyperventilation. Why would hyperventilation lead to an increase in body pH?

A blockage in the trachea due to a piece of corn would prevent air from reaching the nasal cavity.

An X-ray shows a piece of food trapped in the lung of a patient. Which anatomical structure would have to fail for this to occur?

Air enters the nasal cavity through which of the following passageways?

These microscope structures are the sites of gas exchange in the lungs?

Which of the following best describes the blood after it has traveled to the lungs. 

Damage to this set of nerves would prevent the contraction of the diaphragm, leading to respiratory arrest. 

Check all of the following that are true about patients with Type A blood.