Colonmucosa Submucosa Muscularis Serosa 25x Stock Photo 157227376Colon,Color Image,Healthcare And Medicine,Immunofluorescent Photomicrograph,Large Intestine,Magnification,Microbiology,Mucus,No People,Photography,Purple,Research,Tissue,USA,VerticalPhotographer Ed ReschkeCollection: Oxford Scientific Ed ReschkeColon or Large Intestine, Layers--Mucosa, Submucosa, Muscularis, and Serosa, Human, 25X. Cross sectional view. The mucosa includes simple columnar epithelium with goblet cells with mucus (purple). The submucosa extends like a finger into the mucosal fold. Below the submucosa is the muscular layer with an inner circular and outer longitudinal layer of smooth muscle. A small amount of the serosa (connective tissue) is visible.