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INTRODUCTIONInternalanalsphincter(IAS)isacontinuationofthesmoothcircularmusclelayerthickenedattherectum,innervatedbyvegetativ...
INTRODUCTIONInternalanalsphincter (IAS) isacontinuationofthesmoothcircularmusclelayerthickenedattherectum, innervatedbyvegetativ ...