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In Biology / Junior High School | 2025-06-27

Why do you think the chest expands then relaxes during breathing

Asked by roddelyn6588

Answer (1)

Answer:The chest expands and contracts during breathing due to the combined actions of the diaphragm and the muscles between the ribs. When we inhale, the diaphragm moves downward and the rib cage lifts outward, increasing the size of the chest cavity. This drop in pressure inside the lungs allows air to flow in. During exhalation, those muscles relax, the diaphragm returns to its normal position, and the chest cavity shrinks causing air to be pushed out. This change in pressure and volume follows Boyle’s Law and is essential for the proper exchange of oxygen and carbon dioxide in the lungs.

Answered by S07VENT | 2025-06-29

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