Rectum and anal canal

Health Home Conditions and Diseases. The location and morphology of preganglionic neurons and the distribution of visceral afferents from the rat pelvic nerve: a horseradish peroxidase study. Complications involving the anal sphincter are more common in people with IBD than they are in people who do not have Crohn's disease or ulcerative colitis. The intrinsic activity of the smooth muscles and the interaction with the enteric nervous system program the activity that is necessary to expel feces, but the external anal sphincter is controlled through somatic nerves with axons running in the pudendal nerves. Sign up for Nature Briefing. How to Treat an Anal or Rectal Abscess. What could we have explained better?
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The Anal Canal

Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Colorectal cancer CRC : almost all cases of CRC are adenocarcinoma and the majority of lesions arise from the malignant transformation of an adenomatous polyp. Share on facebook. Under involuntary control Below the pectinate line: somatic innervation Inferior rectal branch of the pudendal nerve Under voluntary control Differences in anal neurovasculature above and below the pectinate line: IMA: inferior mesenteric artery IMV: inferior mesenteric vein LN: lymph node IVC: inferior vena cava Image by Lecturio. Hemorrhoids: Clinical manifestations and diagnosis. Anatomical Position The anal canal is located within the anal triangle of the perineum between the right and left ischioanal fossae. They can cause bleeding and itchiness, and depending on the severity, can be managed conservatively or surgically.
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Rectum and Anal Canal | Concise Medical Knowledge

Anal fissure: Clinical manifestations, diagnosis, prevention. If they become swollen and distended, they are referred to as pathological haemorrhoids. Lecturio Medical complements your studies with evidence-based learning strategies, video lectures, quiz questions, and more — all combined in one easy-to-use resource. Image by Lecturio.
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Rectum and Anal Canal

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Description: Superior rectal vein, which empties into the inferior mesenteric vein portal venous system. Coccyx and sacrum. Venous Drainage Superior rectal vein, which empties into the inferior mesenteric vein portal venous system. Inferior rectal artery branch of the internal pudendal artery.

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