EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Lungs and trachea
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Rib cage and diaphragm
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Rib cage and nasal passage
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Diaphragm and nasal passage
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Detailed explanation-1: -As the diaphragm contracts, it increases the length and diameter of the chest cavity and thus expands the lungs. The intercostal muscles and neck muscles help move the rib cage and thus assist in breathing. Abdominal muscles are sometimes involved in breathing out.
Detailed explanation-2: -The diaphragm relaxes during natural exhalation, helping the air to pass out as the lungs deflate. Like the diaphragm, the ribs shield the lungs and expand while we inhale to promote room for the lungs to expand. Then the ribs contract, expelling the air from the lungs.
Detailed explanation-3: -The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.