Final answer:
The taenia coli are three smooth muscle bands along the outside of the colon, contribute to the formation of haustra, and have epiploic appendages attached to them.
Step-by-step explanation:
The taenia coli are bands of muscle running along the outside of the colon. They are one of three bands of smooth muscle that make up the longitudinal muscle layer of the muscularis of the large intestine, with the exception of the terminal end.
The tonic contractions of the taenia coli contribute to the formation of haustra, which are pouches that give the colon a wrinkled appearance. Additionally, attached to the taenia coli are small fat-filled sacs of visceral peritoneum known as epiploic appendages, though the function of these appendages is currently unknown.