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10 questions
The diaphragm contracts.
Inhalation
Exhalation
The rib cage expands.
Inhalation
Exhalation
The diaphragm expands and arches upward.
Inhalation
Exhalation
Air enters the lungs.
Inhalation
Exhalation
The diaphragm moves downward.
Inhalation
Exhalation
Muscles between the ribs contract.
Inhalation
Exhalation
Muscles between the ribs relax.
Inhalation
Exhalation
The volume of the rib cage decreases.
Inhalation
Exhalation
The diaphragm relaxes.
Inhalation
Exhalation
Air is forced out of the lungs.
Inhalation
Exhalation
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