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.

Write the clinical term for difficulty breathing while lying down.

A list of structures of the respiratory system will be provided. Match that structure to whether it is a part of the upper respiratory tract or the lower respiratory tract. 

The purpose of respiration is the provide oxygen for cellular respiration and remove carbon dioxide waste from cellular respiration. 

The sympathetic nervous system (fight or flight) causes bronchodilation – an increase in the size of the bronchi. What effect would this have on airflow?

This type of protein is produced by B-Lymphocytes that neutralize harmful agents in the body.