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.
Lastly, the epiploic appendages which are fatty pouches situated along the part of the peritoneum known as the omentum. The colon is divided into the cecum with its vermiform appendix, the ascending colon, the transverse colon, the descending colon, the sigmoid colon and the rectum and anal canal. It makes up part of the midgut and the hindgut and is both intraperitoneal and retroperitoneal.