During inhalation...
Intercostal muscles [blank_start]contract[blank_end] and move [blank_start]out[blank_end].
The diaphragm [blank_start]contracts[blank_end] and moves [blank_start]down[blank_end].
The volume in the lungs [blank_start]increases[blank_end] and the air pressure in the lungs [blank_start]decreases[blank_end].
Answer
contract
relax
out
in
contracts
relaxes
down
up
increases
decreases
decreases
increases
Question 2
Question
During exhalation...
Intercostal muscles [blank_start]contract[blank_end] and move [blank_start]out[blank_end].
The diaphragm [blank_start]contracts[blank_end] and moves [blank_start]down[blank_end].
The volume in the lungs [blank_start]increases[blank_end] and the air pressure in the lungs [blank_start]decreases[blank_end].