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11-10-2021
Biology

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The picture shows a model of a human respiratory system. Explain what must happen in order for INHALATION (breathing in) to occur.

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11-10-2021

Answer:

When inhaling, the outer intercostal muscle contracts pulling the ribs up. At the same time the muscles of the diaphragm contract, pulling the diaphragm down into a more flattened shape. opposite

happens when exhaling..

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