ZoologyVolume of thoracic chamber increases in the vertical axis due to

Volume of thoracic chamber increases in the vertical axis due to

  1. A

    Contraction of external inter-costal muscles

  2. B

    Relaxation of external inter-costal muscles

  3. C

    Relaxation of diaphragm

  4. D

    Contraction of diaphragm

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    Solution:

    The Correct option is D i.e., Contraction of diaphragm
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