| 词汇 | sigmoid-colon |
| 释义 | sigmoid colon noun[ Cusually singular ] anatomy specializeduk /ˌsɪɡ.mɔɪd ˈkəʊ.lɒn/ us /ˌsɪɡ.mɔɪd ˈkoʊ.lən/ an S-shaped part at the end of the large intestine that connects the colon to the rectum and stores solid waste before it leaves the body: An ulcer was found in the sigmoid colon, on colonoscopy. As food moves through the ascending colon, fluids are removed, so that contents become increasingly more solid until they reach the sigmoid colon. The sigmoid colon is characterized by its circular folds. The rectum extends for about 8 inches from the sigmoid colon to the anus. In some cases, enemas may be given a couple of hours before the test to clean out the sigmoid colon. The digestive system brush border caecal cardia chyme coeliac digestive tract intestinal intestine intraluminal jejunal jejunum lacteal large intestine rectum small intestine unassimilable ureteral vermiform appendix vermiform process villous Synonymsigmoid |
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