Respiration and the Respiratory System

Alveolus (singular of alveoli)

Respiration produces carbon dioxide, which needs to be removed from the body.

78% in both inhaled and exhaled air.

<p>The breathing rate and volume (depth) of breathing increase during exercise to take in more oxygen needed for increased respiration in muscle cells.</p> Signup and view all the answers

<p>The mirror steams up because the water vapor in the exhaled air condenses on the cold surface.</p> Signup and view all the answers

<p>Oxygen diffuses into the blood.</p> Signup and view all the answers

<p>The main function of the respiratory system is gas exchange.</p> Signup and view all the answers

<p>The ribs protect the lungs.</p> Signup and view all the answers

<p>Lungs expand to allow you to take in lots of oxygen.</p> Signup and view all the answers

<p>The left lung is normally smaller than the right lung.</p> Signup and view all the answers