sigmoid colon
Noun: * Sigmoid Colon: The S-shaped final segment of the large intestine, connecting the descending colon to the rectum. It is named for its characteristic "S" or sigma (Σ)-like shape.
The term "sigmoid colon" is used specifically in medical, anatomical, and biological contexts to describe a distinct part of the human digestive system. * It functions as a site for the storage of fecal matter before it moves into the rectum for elimination. * It is a common location for medical examinations (e.g., sigmoidoscopy) and certain health conditions.
- During the colonoscopy, the doctor noted a polyp in the sigmoid colon.
- The sigmoid colon is responsible for absorbing water and electrolytes from the remaining indigestible food matter.
- Diverticulitis frequently occurs in the sigmoid colon.
- Sigmoid colon volvulus: A medical condition where the sigmoid colon twists on itself, causing a bowel obstruction.
- Sigmoid colon resection: A surgical procedure to remove a portion of the sigmoid colon.
- Sigmoid (adjective): Having the shape of the letter S or the Greek letter sigma (Σ). Can be used more generally outside of anatomy (e.g., a sigmoid curve in mathematics).
- Colon (noun): The main part of the large intestine, of which the sigmoid colon is the final segment.
- Sigmoidoscopy (noun): A diagnostic procedure to examine the interior of the sigmoid colon and rectum.
- Sigmoid flexure (a less common anatomical term).
- Pelvic colon (an older anatomical term, as it resides in the pelvic cavity).
The word "sigmoid" alone has a broader application: * In Mathematics/Statistics: A sigmoid function is an S-shaped curve, often used in logistic regression and neural networks. * In General Use: Anything with a double-curve, S-like shape can be described as sigmoid.
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the s-shaped curve between the descending colon and the rectum
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