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CBSE Class 11-science Answered

State the two stages involved in breathing. Name the components which help in adjusting the volume of the thoracic chamber.
Asked by Topperlearning User | 18 Jul, 2014, 02:17: PM
answered-by-expert Expert Answer

Two stages involved in breathing are 

  1. Inspiration: Atmospheric air is drawn inside the body.

  2. Expiration: Alveolar air is released out of the body.

The diaphragm and internal and external intercostal muscles help in adjusting the volume of the thoracic chamber.

Answered by | 18 Jul, 2014, 04:17: PM
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