Which of the following is correct
i) the diaphragm contracts - volume of chest cavity increased
ii) the diaphragm contracts - volume of chest cavity decreased
iii) the diaphragm expands - volume of chest cavity increased
iv) the diaphragm expands - volume of chest cavity decreased
a) i
b) i & ii
c) ii & iii
d) iv

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Answers

2015-06-24T16:50:36+05:30

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The correct answer is ⇒  ( C ) i.e.   ( ii & iii )

The diaphargm contracts - vol. of chest cavity decreased and when it expands the vol. of chest cavity increased.
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