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).
After food travels through the sigmoid colon, it enters the rectum. The rectum is a straight, muscular tube. The muscle layers are very thick to push food into the anal canal. The anal canal is the last 2-3 centimeters of the digestive tract.he liver is a very important part of the digestive system, even though food does not directly pass through it. The liver produces bile (a greenish fluid which aids in the digestion of fats), which is stored in the gall bladder.