Where are the respiratory centers housed which control involuntary breathing rates:

Changes in oxygen levels in the blood are the most important stimuli for breathing in a healthy person.

The nasal cavity is separated from the oral cavity by the nasal conchae.

_____ – carry lymph from peripheral tissues to the venous system

Where are the tonsils located:

Which one of the following is NOT a mechanism that aids lymph return:

Allergies, or hypersensitivities, are normal immune responses.

The respiratory membrane is the air-blood barrier, where gases are exchanged.

If a student inhales as deeply as possible the amount of air that he took in would be his tidal volume and _____

Allergies, or hypersensitivities, are normal immune responses.