Area between the teeth and lips/cheeks

Air in respiratory passages that does not contribute to gas exchange

The amount of air that can be inspired above the tidal volume is called ________.

Wormlike sac that out pockets from the cecum

The parasympathetic nervous system influences digestion by–

The most powerful respiratory stimulus for breathing in a healthy person is ________.

Do the following factors generally increase or decrease the respiratory rate and depth?  Increase in blood CO2

Which respiratory-associated muscles would contract if you were to blow up a balloon?

The primary immune response ________.

Which of the following maintains the patency (openness. of the trachea?