The pectinate line (dentate line) is a line which divides the upper two thirds and lower third of the anal canal
. Developmentally, this line represents the hindgut
It is an important anatomical landmark in humans, and several distinctions can be made based upon the location of a structure relative to this line:
File:Rectoanal jxn.JPG|Microscopic cross section of the anorectal junction.
File:Anorectum-en.svg |Anatomy of the anus and rectum
File:Gray1078.png|Coronal section of rectum and anal canal.