The pectinate line

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August undefined, 2024

WebbUpper region (frequently named pecten): It’s 15 millimeters long and stretches from the pectinate line to Hilton’s line. It’s lined by the non-keratinized stratified squamous epithelium. The mucous lining in this region appears bluish in colour because of underlying dense venous plexus and is adherent to the underlying structures. 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-proctodeum junction. It is an important anatomical landmark in humans, and several distinctions can be made based upon the location of a structure … Visa mer • Microscopic cross section of the anorectal junction. • Anatomy of the anus and rectum • Coronal section of rectum and anal canal. Visa mer • pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (rectum) Visa mer

Pectinate line - wikidoc

WebbThe pectineal line of the pubis (also pecten pubis) is a ridge on the superior ramus of the pubic bone. It forms part of the pelvic brim . Lying across from the pectineal line are fibers of the pectineal ligament, and the … Webb30 mars 2024 · Chronic anal fissure presents as longitudinal, deep ulcer, sometimes coated with smear. Secondary changes can occur in their development, such as hypertrophied anal papillae close to the proximal edge of the fissure at the level of the pectinate line, also pathologically altered crypts (anal cryptitis) or sentinel tags … great in counters ri website

Inferior rectal nerve Radiology Reference Article - Radiopaedia

Webb23 juli 2016 · The anal valves collectively form an irregular circle – known as the pectinate line (or dentate line). This line divides the anal canal into upper and lower parts, which … Webb25 juli 2024 · The pectinate line is an important anatomic landmark, as it is where the blood supply, lymphatics, and nerves differ based on being above or below the pectinate line. Above the pectinate line, the superior … WebbFinally, the hindgut extends from the distal third of the transverse colon to the anal canal, above the pectinate line. It consists of the distal portion of the transverse colon, descending colon and sigmoid colon and rectum. Now, remember that organs with the same embryologic origin share the same arterial supply, ... great in counters ri

Why is the pectinate line important? - Studybuff

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WebbThe postmortem finding of anal dilation or an exposed pectinate line in children who have died under suspicious circumstances continues to raise the concern of possible sexual … WebbThe valves mark the end of the sinuses and the dividing line where the mucous lining begins changing into skin (the pectinate line or dentate line). The upper and lower parts … floating into the night vinylWebb2 dec. 2024 · The pectineus muscle is a hip adductor, one of a group of five large muscles on the medial (middle) thigh that adduct the leg. The other hip adductors include the … great in comparative

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The pectinate line

Common Anorectal Conditions: Part II. Lesions AAFP

WebbThe pectinate line is called the watershed line because it separates the two entirely different parts of the anal canal (in terms of development, nerve supply, blood supply and lymphatic drainage). How far in is dentate line? The median distance between the dentate line and the anal verge was 2.0 cm. WebbThe pectinate line is more than the line where the mucosal lining of the anal canal changes to skin. It is also a key dividing point for the flow of lymph in the anal canal. Above the pectinate line, lymph flows to the inferior mesenteric and internal iliac lymph nodes. Below the pectinate line, lymph flows to the superficial inguinal lymph nodes.

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Webbpec·ti·nate line [TA] the line between the simple columnar epithelium of the rectum and the stratified epithelium of the anal canal, usually defined as being at the level of the anal valves at the bases of the anal columns. Synonym (s): linea pectinata canalis analis [TA], dentate line Farlex Partner Medical Dictionary © Farlex 2012 pectinate line WebbWe indicate anterior and posterior. We show the anal columns, which are folds of tissue raised by the underlying vasculature. Inferiorly at the end of the columns, we see the pectinate line, which is a mucocutaneous line marking the demarcation between lining derived from endoderm superiorly and ectoderm inferiorly.

Webb3 juni 2024 · Ano-Rectal anatomy: Above and below pectinate line Here's an illustration I made :) It shows the embryology, pathology, innervation, blood supply, venous drainage … WebbThe whitish line called the pectinate line (Hilton's) indicates the junction between keratinized stratified squamous epithelium and unkeratinized stratified squamous epithelium. This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – …

Webb16 dec. 2024 · Internal hemorrhoids occur above the pectinate line (superior rectal vein) and are not painful (visceral innervation). External hemorrhoids occur below the pectinate line and are painful because the pudendal nerve provides this area with somatic innervation. The pudendal nerve (S2 – S4) innervates the external anal sphincter. Webb26 maj 2024 · The pectinate line demarcates the superior two-thirds of the anal canal from the inferior one-third. It also serves as an embryologic landmark that explains the differing arterial supply, venous drainage, lymphatic drainage, and nervous supply of the segments of the anal canal.

WebbThe pectinate or dentate line is a histologic transition zone between squamous and columnar epithelium at the level of the anal valves. … Below the pectinate line, the …

Webb4 juni 2012 · The dentate (pectinate) line divides the anal canal into upper (two-thirds) and lower (one-third) parts, each one being supplied by completely different neurovascular … great indeed are your works lyricsWebb23 jan. 2024 · Essential features Diagnostic: Absent ganglion cells, submucosal nerve hypertrophy, absent calretinin immunoreactive mucosal innervation and increased cholinergic mucosal innervation (AChE histochemistry or ChT immunohistochemistry) Intraoperative: Levelling biopsy: identification of ganglion cells floating in water crosswordWebbLower rectum to anal canal (above pectinate line) - recall how the pectinate line is an important border (eg for portal vs systemic venous drainage, for visceral vs somatic innervation) Superficial inguinal . Anal canal (below pectinate line) - … great indeed headlinesWebb3 okt. 2016 · ANAL CANAL Lymphatic drainage: Accompany the arteries, Above the pectinate line: para-rectal LN to the inferior mesenteric LN. Below the dentate line: to superficial and deep inguinal LN. Nerve supply: Above the pectinate line : Autonomic N. supply ,via superior and inferior hypogastric ganglia(not sensitive ) Below the pectinate … greatindiagroupWebbAlso known as inner hemorrhoids or internal piles, these conditions cause inflamed vascular structures inside the anal canal. They’re located above the pectinate line and are mostly painless. Unlike external hemorrhoids, can’t be seen from the outside since external hemorrhoids are located below the pectinate line. floating in water crossword clue great index fund takeoverWebbpec·ti·nate line [TA] the line between the simple columnar epithelium of the rectum and the stratified epithelium of the anal canal, usually defined as being at the level of the anal … great index nd takeover