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Anatomy of Fallopian tube. Diagram illustrates the normal anatomy of Fallopian tube. The uterine tube has been distinguished in four anatomical regions: infundibulum with fimbriae, which are closely associated with the ovary, that opens into the peritoneal cavity; ampulla with highly folded structure with plicae and secondary folds dividing the lumen; isthmus with fewer mucosal folds and a thick muscularis layer; intramural portion that passes through the muscular wall of the uterus
