Anal canal

Anal canal
Anatomy of the anus and rectum
Coronal section through the anal canal. B. Cavity of urinary bladder V.D. Ductus deferens. S.V. Seminal vesicle. R. Second part of rectum. A.C. Anal canal. L.A. Levator ani. I.S. Sphincter ani internus. E.S. Sphincter ani externus.
Details
PrecursorHindgut, proctodeum
ArterySuperior rectal artery (above pectinate line) and inferior rectal artery (below line)
VeinSuperior rectal vein (above pectinate line) and Inferior rectal vein (below line)
NerveAutonomic inferior hypogastric plexus (above pectinate line) and somatic inferior rectal nerves (below line)
LymphSuperficial inguinal lymph node (below pectinate line) and internal iliac lymph nodes (above line)
Identifiers
Latincanalis analis
MeSHD001003
TA98A05.7.05.001
TA23009
FMA15703
Anatomical terminology

The anal canal is the part that connects the rectum to the anus, located below the level of the pelvic diaphragm.[1] It is located within the anal triangle of the perineum, between the right and left ischioanal fossa. As the final functional segment of the bowel, it functions to regulate release of excrement by two muscular sphincter complexes. The anus is the aperture at the terminal portion of the anal canal.

  1. ^ Madoff, Robert D.; Melton-Meax, Genevieve B. (2020). "136. Diseases of the rectum and anus". In Goldman, Lee; Schafer, Andrew I. (eds.). Goldman-Cecil Medicine. Vol. 1 (26th ed.). Philadelphia: Elsevier. p. 933. ISBN 978-0-323-55087-1.