Colon, light micrograph (LM). The colon is lined with intestinal villi containing crypts of Lieberkuhn, elongated pockets that lie in the vascular submucosa. These glands contain two types of cells, goblet cells, which secrete a lubricant( mucous) into the colon which aids the movement of faeces; and absorptive columnar epithelial cells, which absorb water from the faeces. The number and shape of the glands greatly increases the surface area for absorption. Magnification: x150 when printed at 10 centimetres wide.