During speaking and singing ratio of inhalation to exhalation - ANSWER-10% inhalation

and 90% exhalation

Diaphragm in inhalation of quiet breathing function - ANSWER-flattens and descends,

increase lung and thoracic volume inferiorly to superiorly

external intercostals during inhalation of quiet breathing function - ANSWER-lift ribs, ribs

torque out, increase lung and thoracic volume anteriorly to posteriorly

Diaphragm in exhalation of quiet breathing - ANSWER-ascends and relaxes, decrease...
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