3. (Aeronautics) any structure corresponding to or resembling the keel of a ship, such as the central member along the bottom of an aircraft fuselage. 4. (Biology) biology a ridgelike part; carina. 5. a poetic word for ship.
Transverse colon and sigmoid colon. The transverse colon and the sigmoid colon have a mesentery (ie, transverse mesocolon and sigmoid mesocolon, respectively), but the ascending colon and descending colon are retroperitoneal, while the cecum is intraperitoneal but uses the mesentery of the ileum.
It is divided into four sections, the ascending, transverse, descending, and sigmoid colon. After passing through the small intestines, water, fiber, and some vitamins mix with mucus and bacteria to form feces. The feces will move through the colon and the lining of the colon will absorb some of the vitamins, minerals and water. Feces will continue moving down the colon until it reaches the walls of the sigmoid colon where they will contract and cause the feces to move into the rectum (Large Intestine, 2015)