Humans inspire by contracting muscles that insert on the rib cage and by contracting the

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Quizplus · Accepted Answer

Humans inspire (inhale) by contracting the diaphragm, which is a dome-shaped muscle at the base of the lungs. When it contracts, it moves downward and increases the volume of the thoracic (chest) cavity, which allows air to be drawn into the lungs. The other muscle groups listed may also contribute to the process of breathing but are not primarily responsible for the inspiratory phase.

Humans Inspire by Contracting Muscles That Insert on the Rib