a.contracts; decreases; inward
b.ontracts; increases; inward
c.relaxes; decreases; inward
d.relaxes; decreases; outward
e.relaxes; increases; inward
Answer is B
During inspiration the diaphram muscle contracts it flattens out and drops down out of the
chest cavity making more room and creating a vaccum -- air then rushes
into the lungs.
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