Compared to an adult, the diaphragm dictates the amount of air that a child inspires because the:
A. intercostal muscles are not well developed.
B. rib cage is rigid and provides little flexibility.
C. abdominal organs force the diaphragm upward.
D. upper airway is smaller and easily collapsible.
Answer: A. intercostal muscles are not well developed.
Health Professions
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