Rectum Anatomy

It is located within the pelvis and is the continuation of the sigmoid colon after the rectosigmoid junction and continues as the anal canal at the anorectal angle created by puborectalis. The rectum lies next to the sacrum and generally follows its curvature.

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If the defecation process is delayed it may result in constipation.

Rectum anatomy. In the context of mesenteric ischemia the upper rectum is sometimes referred to as sudaks point and is of. The rectum is supplied by the superior rectal artery branch of the inferior mesenteric artery middle rectal artery branch of the internal iliac artery and inferior rectal artery branch of the internal pudendal artery from the internal iliac artery. The rectum receives arterial supply through three main arteries.

This may be episodic over a persons lifetime. The rectum is an expandable organ for the temporary storage of feces. The description in this topic is from below upwards as that is how this region is usually examined in clinical practice.

Histology the mucosa forms the innermost layer of the rectum that is in contact with fecal matter. The peritoneum firmly attaches the rectum to the sacrum. Inferior rectal artery branch of the internal pudendal artery.

The anus starts at the bottom of the rectum the last portion of the colon large intestine. The anorectal line separates the anus from the rectum. Tough tissue called fascia surrounds the anus and attaches it to nearby structures.

Rectum terminal segment of the digestive system in which feces accumulate just prior to discharge. Ulcerative colitis one form of inflammatory bowel disease that causes ulcers that affect the rectum. The expansion of the rectal walls causes the stretch receptors within the walls to stimulate the urge to defecate.

Next is the muscularis layer which contains layers of visceral smooth muscle. Other diseases of the rectum include. The anus and anal canal.

The anus is the opening where the gastrointestinal tract ends and exits the body. Superior rectal artery terminal continuation of the inferior mesenteric artery. The venous blood drains through the correspondent veins into.

Deep to the mucosa is the submucosa layer that supports the other layers of the rectum. A muscular sheet called the pelvic diaphragm runs perpendicular to the juncture of the rectum and anal canal. The rectum is the last part of the large intestine.

Middle rectal artery branch of the internal iliac artery. This results in the feces entering the canal. The rectum ends about 5 centimeters below the tip of the coccyx where it becomes the anal canal.

The anal canal is the most terminal part of the lower gi tractlarge intestine which lies between the anal verge anal orifice anus in the perineum below and the rectum above. When the storage site becomes full the intrarectal pressure causes the anal canal walls to dilate and expand. The rectum is continuous with the sigmoid colon and extends 13 to 15 cm 5 to 6 inches to the anus.

Finally the serosa forms the.

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