What returns the diaphragm and sternum to their normal positions?

What returns the diaphragm and sternum to their normal positions?
  1. Contraction of diaphragm
  2. Relaxation of diaphragm
  3. Contraction of external intercostal muscles
  4. Relaxation of intercostal muscles

Solution

The relaxation of the diaphragm and the intercostal muscles returns the diaphragm and sternum to their normal positions.

Asked in: NCERT

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