Explain in your own words how the movements of the ribs and diaphragm bring about inhalation. Refer to the exercise you did when you placed your hand to your stomach to observe your breathing. State your answer in 3 sentences.
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Answer:
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. As a result, air rushes in and fills the lungs.
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