When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

Flap of tissue that covers the opening to the windpipe during swallowing

• Pharynx

• Trachea

• Epiglottis

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body
• to bring oxygen to the body
• to break down food and absorb nutrients
• to remove oxygen from the body and deliver carbon dioxide

Given the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation. 

• 1,2,3,4
• 2,3,1,4
• 2,1,3,4
• 4,2,3,1 

Which body function is made possible by the fibrous bands stretched across the larynx?

• swallowing
• breathing
• diffusion
• speech

A chamber behind the nose and mouth that leads to the trachea

• pharynx
• trachea
• epiglottis
• larynx

The drawing in of breath; inhalation.

• Inspiration

• Expiration

Breathing out; exhalation of breath.

• Inspiration

• Expiration

What is the site of gas exchange?

• alveoli

• nose

• lung

• bronchi