what change occurs during inhalation in ribe cage
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the intercoastal muscles (between the ribs) contract and the ribs move up, causing lungs to expand
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The first phase is called inspiration, or inhaling. When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside.
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