Breathe easily
?
Name _________________________________________ Class _______________ Date _________________
1 Draw lines to match each word with its correct meaning.
breathing
absorbing oxygen from the air and
getting rid of carbon dioxide
ribs
flow of air into and out
of your lungs
gas exchange
when your muscles change
the size of your chest
exhalation
sheet of muscle that separates your chest
from the rest of your body below it
ventilation
bones that move when you breathe
inhalation
breathing in
breathing out
diaphragm
2
a Which diagram shows the boy breathing out?
b Label the ribs and the diaphragm on the diagrams.
• describe what happens when you breathe.
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