EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Events that do not occur during expiration are:
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The muscles between the ribs relax
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Relaxation of the diaphragm muscle
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Chest cavity enlarged
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Lungs shrink
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Explanation:
Detailed explanation-1: -In the expiratory phase, the abdominal wall moves inward as the diaphragm relaxes, and the chest wall moves outward because the ambient pressure is lower than the pressure inside the lungs.
Detailed explanation-2: -The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is sucked in through your nose or mouth. The air travels down your trachea, or windpipe, and into your lungs.
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