Main muscle of inhalation separating the cavities of the thorax and abdomen; its contraction increases the size of the thoracic cavity, causing the lungs to expand and take in air.

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Photo credit: © QA International / Alamy / Afripics
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Keywords: abdomen, air., anatomy, body, causing, cavities, cavity, color, contraction, diaphragm, expand, human, illustration, increases, inhalation, lungs, main, muscle, separating, size, thoracic, thorax