Which muscles help us to increase the strengt | vedclass

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(D) Cardiac muscles,which are the muscles of the heart,have no role in the process of inspiration and expiration.Abdominal muscles and internal interc

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Both $(b)$ and $(c)$

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(D) Cardiac muscles,which are the muscles of the heart,have no role in the process of inspiration and expiration.Abdominal muscles and internal intercostal muscles are accessory muscles that assist in forced breathing.During forced expiration,the contraction of abdominal muscles and internal intercostal muscles increases the strength of expiration,thereby increasing the volume of air exhaled.

Which muscles help us to increase the strength of inspiration and expiration?

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