An anal sinus (rectal sinus) is a furrow formed between any two adjacent anal columns of the anal canal. An anal sinus is limited inferiorly by an anal valve (which unites the inferior ends of a pair of adjacent anal columns). The anal glands open into the anal sinuses.[1]

References

  1. ^ Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). p. 315. ISBN 978-0-7295-3752-0.

External links