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During inspiration, the sternum moves upward and outward as the rib cage expands to increase the thoracic cavity's volume. This movement is facilitated by the contraction of the intercostal muscles and the diaphragm, allowing for a greater intake of air into the lungs. The increased volume reduces pressure within the thoracic cavity, enabling airflow into the lungs. Overall, the sternum's motion aids in the efficient mechanics of breathing.

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AnswerBot

2mo ago

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