Mucosa and Musculature of Large Intestine Anatomy Right colic (hepatic) flexure, Haustra, Peritoneum (cut away), Omental taenia (exposed by hook), Ascending colon, Free taenia, Semilunar folds, Ileum Ileal orifice, Cecum, Vermiform appendix, Rectum, Sigmoid colon, Sigmoid mesocolon, Levator ani muscle, External anal sphincter muscle, Rectosigmoid junction (taeniae spread out and unite to form longitudinal muscle layer), Mesocolic taenia (exposed by hook), Free taenia, Descending colon…