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.
â¢ The ascending colon travels up the right side of the abdomen. â¢ The transverse colon runs across the abdomen. â¢ The descending colon travels down the left abdomen. â¢ The sigmoid colon is a short curving of the colon, just before the rectum.The colon removes water, salt, and some nutrients forming stool. The transverse colon runs across the abdomen. â¢ The descending colon travels down the left abdomen. â¢ The sigmoid colon is a short curving of the colon, just before the rectum. The colon removes water, salt, and some nutrients forming stool.