MUCOSA OF THE COLON, SEM. MUCOSA OF THE COLON, SEM The colon is a part of the intestine. It starts at the end of the intestinum tenue and ends at the rectum. It processes and conveys fecal material. It measures around 1 m 40. Like the rest of the digestive tube it is carpeted by a mucous membrane. This last one is composed of an epithelium, glands, and conjonctive tissue. The glands of this mucous membrane have a precise physiologic funtion in the absorption of food. Mucous of the colon in SEM x