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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Expression of Emotion in Man and Animals by Charles Darwin: distended as possible.
[11] I have given several instances in my `Descent
of Man,' vol. i. chap. iv.
Various causes have been assigned for this manner of acting.
Sir C. Bell maintains[13] that the chest is distended with air,
and is kept distended at such times, in order to give
a fixed support to the muscles which are thereto attached.
Hence, as he remarks, when two men are engaged in a deadly contest,
a terrible silence prevails, broken only by hard stifled breathing.
There is silence, because to expel the air in the utterance of any
sound would be to relax the support for the muscles of the arms.
 Expression of Emotion in Man and Animals |