1. The system consists of:
a. _________________________
b. _________________________
c. _________________________
d. _________________________
e. _________________________
f. _________________________
2. Lungs operate by the _________________________.
3. Breathing in--ribs move _________ and ___________.
4. Breathing out--ribs move ________ and ____________.
Look at the diagram on the computer and write the word from the word box that belongs to the letter on the lines below.
a. _________________________
b. _________________________
c. _________________________
d. _________________________
e. _________________________
f. _________________________
g. _________________________
h. _________________________
i. _________________________
j. _________________________
k. _________________________
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