PHYSIOLOGY
PULMONARY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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up
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down
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both
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None of the above
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Detailed explanation-1: -The second phase is called expiration, or exhaling. When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. As a result, the lungs contract and air is forced out.
Detailed explanation-2: -During exhalation, the ribs moves down and inward and the diaphragm moves up. This movement increases the space in our chest cavity and the air is pushed out.
Detailed explanation-3: -During inhalation, the diaphragm contracts and moves downwards. This increases the space in your chest cavity into which the lungs expand. The intercostal muscles between the ribs also help in enlarging the chest cavity. Whereas during exhalation the diaphragm relaxes and moves upwards into the chest cavity.