Biology for IGCSE & O level - Gas Exchange In Humans (Section 4 - No. 14)
During exhalation, which of the following events occur?
The diaphragm contracts and moves upward.
The rib cage moves upward and outward.
The chest cavity volume increases.
The pressure inside the lungs decreases.
Explanation
During exhalation, the diaphragm relaxes, moving upward and decreasing the volume of the chest cavity.
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