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Encyclopedia > Pectinate line
Pectinate line
Pectinate line labeled at bottom center.
The interior of the anal cami and lower part of the rectum, showing the columns of Morgagni and the anal valves between their lower ends. (Pectinate line visible but not labeled.)
Latin linea anocutanea
Dorlands/Elsevier l_10/12496033

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. Image File history File links Download high-resolution version (1100x813, 516 KB) Diagram to show a variety of Hemorrhoids to assist in the Hemorrhoid article. ... Image File history File links Size of this preview: 500 × 318 pixelsFull resolution (500 × 318 pixel, file size: 53 KB, MIME type: image/png) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Wikipedia:Grays Anatomy images with... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo. ... The rectum (from the Latin rectum intestinum, meaning straight intestine) is the final straight portion of the large intestine in some mammals, and the gut in others, terminating in the anus. ... The anal canal is the terminal part of the large intestine. ...

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

Distinction Above pectinate line Below pectinate line
destination of lymph drainage internal iliac lymph nodes, inferior mesenteric lymph nodes superficial inguinal lymph nodes
epithelium columnar epithelium (as is most of the digestive tract - the line represents the end of the part of the body derived from the hindgut) stratified squamous epithelium (as is most of the skin.)
blood superior rectal artery inferior rectal arteries
hemorrhoids classification internal hemorrhoids (not painful) external hemorrhoids (painful)
nerves inferior hypogastric plexus inferior rectal nerves

In mammals including humans, the lymphatic vessels (or lymphatics) are a network of thin tubes that branch, like blood vessels, into tissues throughout the body. ... The internal iliac lymph nodes (or hypogastric) surround the hypogastric vessels, and receive the lymphatics corresponding to the distribution of the branches of the hypogastric artery, i. ... The inferior mesenteric glands consist of: (a) small glands on the branches of the left colic and sigmoid arteries (b) a group in the sigmoid mesocolon, around the superior hemorrhoidal artery (c) a pararectal group in contact with the muscular coat of the rectum They drain the descending iliac and... The superficial inguinal lymph nodes form a chain immediately below the inguinal ligament. ... In zootomy, epithelium is a tissue composed of a layer of cells. ... Hindgut is the posterior (caudal) part of the alimentary canal. ... H&E stain of biopsy of normal esophagus showing the stratified squamous cell epithelium Section of the human esophagus. ... The superior rectal artery (superior hemorrhoidal artery) is an artery that descends into the pelvis to supply blood to the rectum. ... The inferior rectal artery (inferior hemorrhoidal artery) is an artery that supplies blood the the rectum. ... This article or section is in need of attention from an expert on the subject. ... The inferior hypogastric plexus (pelvic plexus in older texts) is a plexus of nerves that supplies the viscera of the pelvic cavity. ... The Inferior rectal nerves (inferior anal nerves, inferior hemorrhoidal nerve) occasionally arises directly from the sacral plexus; it crosses the ischiorectal fossa, with the inferior hemorrhoidal vessels, toward the anal canal and the lower end of the rectum, and is distributed to the Sphincter ani externus and to the integument...

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. eMedicine is an online clinical medical knowledge base that was founded in 1996. ... Georgetown University is an elite private research university located in Georgetown, Washington, D.C., United States. ... The Family Practice Notebook is a medical database focused on family practice. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ...



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