GROSS: PELVIS: OBTURATOR MEMBRANE; A=COMMUNICATION BETWEEN ISCHIORECTAL FOSSA; B=INFERIOR RECTAL NEUROVASCULAR BUNDLE; C=EXTERNAL ANAL SPHINCTER
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GROSS: PELVIS: OBTURATOR MEMBRANE; A=COMMUNICATION BETWEEN ISCHIORECTAL FOSSA; B=INFERIOR RECTAL NEUROVASCULAR BUNDLE; C=EXTERNAL ANAL SPHINCTER