At the rectosigmoid junction, the taeniae spread out and unite to form the longitudinal muscle layer.

These bands correspond to the outer layer of the muscularis externa, in other portions of the digestive tract.

The teniae coli are regulated by the sacral nerves of the spinal cord, which are under control of the parasympathetic nervous system.

[1] Spaces between the circular bands of taeniae are weak points in the bowel, and are the sites of diverticulosis.

The taeniae coli are important anatomical landmarks often used by surgeons performing an appendectomy to localize the appendix.