Page 18 - 新思维科学学生用书8 样章
P. 18
1.3 Breathing
1.3 Breathing
In this topic you will:
• measure how much air you can push out of your lungs in
one breath
• learn how the muscles between your ribs and your
diaphragm move air into and out of the lungs.
Getting started Key words
On your own, answer each of these questions. breathing
• What is gas exchange? contract
• Where does gas exchange happen in your body? relax
• Does the air you breathe in contain more or less oxygen
than the air you breathe out?
• Is there any carbon dioxide in the air you breathe in?
• Do you think there is any oxygen in the
air you breathe out?
