The taenia coli merge to envelop the entire circumference of the bowel when they reach the rectosigmoid region of the large intestine.
The base of the appendix can be identified by the point of convergence of the three taeniae coli in the cecum. At the end of the sigmoid colon and the beginning of the rectum, these fibers splay out and are no longer clustered in a longitudinal bandlike fashion.
the taenia coli are most prominent in the cecum and ascending colon. The taenia coli are three longitudinal ribbons of smooth muscle that run along the outside of the ascending, transverse, descending, and sigmoid colons.
The taenia coli act as suspension cables for the circular muscle arcs, which helps the circular muscle contract efficiently. The taenia coli are shorter than the intestine, so the colon becomes sacculated between the taenia, forming the haustra. The haustra are small pouches that give the colon its segmented appearance.
