Most Popular. An impact driver looks similar to a drill/driver but for one noticeable distinctionâinstead of a keyless chuck, it has a collet that accepts hex-shanked driver bits. This tool is specially engineered to do one job: drive screws, which it does faster and easier than any other tool. Impact drivers can drive long, large fastenersâincluding fat lag screwsâthat would stall the very best drill/driver.
Sigmoid colon. The sigmoid colon (pelvic colon) is the part of the large intestine that is closest to the rectum and anus. It forms a loop that averages about 35-40 cm in length. The loop is typically shaped like a Greek letter sigma (Ï) or Latin letter S (thus sigma + -oid).
pelvic colon sigmoid c. right colon the proximal portion of the large intestine, developed embryonically from the terminal portion of the midgut and functioning in absorption of ingested material. sigmoid colon that portion of the left colon situated in the pelvis and extending from the descending colon to the rectum.spastic colon irritable bowel syndrome. transverse colon the portion of the large intestine passing transversely across the upper part of the abdomen, between the right and left colic flexures.igmoid colon that portion of the left colon situated in the pelvis and extending from the descending colon to the rectum. spastic colon irritable bowel syndrome. transverse colon the portion of the large intestine passing transversely across the upper part of the abdomen, between the right and left colic flexures.