Final answer:
The mucous, serous, and cutaneous membranes are all types of epithelial membranes found within the body, which include protective layers of epithelium and connective tissue.
Step-by-step explanation:
The mucous, serous, and cutaneous membranes all belong to the category of epithelial membranes, which are composed of epithelium attached to a layer of connective tissue. Mucous membranes are found lining body cavities and passageways that open to the external environment such as the digestive, respiratory, excretory, and reproductive tracts, and are noted for producing mucus. Serous membranes are associated with the lining of coelomic cavities away from the external environment and play a role in reducing friction between internal organs. The cutaneous membrane, commonly referred to as the skin, is the body's largest epithelial membrane, which protects the inner tissues.