sigmoid colon
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Sigmoid Colon: Where It Is, What It Does, and Why It's Important
the sigmoid colon is the lowest section of the colon. it's responsible for holding and voiding feces. several health conditions may affect the sigmoid colon. there are tests to asses it. the sigmoid colon may be examined during a colonoscopy, but there is also and test, called a sigmoidoscopy, that allows doctors to to view just that section.