Anal canal

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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
Precursor	Hindgut, proctodeum
Artery	Superior rectal artery (above pectinate line) and inferior rectal artery (below line)
Vein	Superior rectal vein (above pectinate line) and Inferior rectal vein (below line)
Nerve	Autonomic inferior hypogastric plexus (above pectinate line) and somatic inferior rectal nerves (below line)
Lymph	Superficial inguinal lymph node (below pectinate line) and internal iliac lymph nodes (above line)
Identifiers
Latin	canalis analis
MeSH	D001003
TA98	A05.7.05.001
TA2	3009
FMA	15703
Anatomical terminology [edit on Wikidata]

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.