Antomy of the anus

Gordon PH, Nivatvongs S, eds. The internal muscle extends up to 4 centimeters [7] and the external one reaches the maximum size of 10 centimeter or more. The internal hemorrhoids blue arrows are located in the upper anal canal, above the dentate line in green. Loading Stack - 0 images remaining. One of them is the human anus.
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Anus Conditions

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Anal Canal Anatomy

Persistent cloaca is a common passage in which the lower GI tract rectum , lower urinary tract bladder or urethra , and lower genital tract in females vagina are open. The syndrome of the descending perineum. Surg Gynecol Obstet ; Lateral to the anal canal are the pyramidal ischioanal ischiorectal fossae 1 on either side , below the pelvic diaphragm and above the perianal skin. The position of the vermiform appendix as ascertained by an analysis of 10, cases. On This Page Related Anatomy. Bladder function after abdominoperineal resection of the rectum for anorectal cancer.
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Applied Anatomy of the Anal Canal and Rectum - ScienceDirect

Somatic nerves, hence sensitive to pain and temperature. The external hemorrhoids white arrows are located below the dentate line, in the lower anal canal. On the coronal images the thickening of the bowel wall is demonstrated. This has the advantage that the muscle is slowly cut and fibroses at the same time in order to cause as little damage as possible to the sphincter complex. This service is more advanced with JavaScript available, learn more at http:
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There was a problem with your submission. Gases pass out as wind flatus. Keep Exploring Britannica Anthropology. Learn More in these related Britannica articles: The others may be viral or cancerous. Hemorrhoids are classified as internal and external , based on whether they arise above or below the dentate line, and often coexist.
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