what is the shape of diaphragm during expiration
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It is a thin, dome-shaped muscle that separates the abdominal cavity from the thoracic cavity. During inhalation, the diaphragm contracts, so that it's center moves caudally (downward) and its edges move cranially (upward).
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Explanation:
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. ... Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.
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