Describe the Zone of Apposition and Its Involvement in Respiration

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The Answer is The costal fibers of the diaphragm run vertically from their origin,in close apposition to the rib cage,before curving to insert into the central tendon.That portion of the diaphragm,which is close to the inner wall of the lower rib cage,is called the zone of apposition.During tidal breathing the descent of the dome of the diaphragm causes only a slight change in its shape,maintaining most of the zone of apposition.As the diaphragm descends,it compresses the abdominal contents,increasing intra-abdominal pressure.The increased pressure is transmitted laterally via the zone of apposition,causing the lower ribs to expand.

Describe the Zone of Apposition and Its Involvement in Respiration

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