Pectinate line

Overview
The pectinate line (anocutaneous line, dentate line, anal verge, anorectal junction) is a line which marks the end of the rectum and the beginning of the anal canal. Developmentally, this line provides the hindgut and proctodeum junction.

It is an important anatomical landmark, and several distinctions can be made based upon the location of a structure relative to this line: