In 1909, Western Union and ADT came under the control of American Telephone & Telegraph Company (AT&T). ADT began to expand into new areas, such as fire alarms and security alarms between 1910 and 1930, but was kept separate from AT&T's Holmes alarm business. ADT became a publicly owned company in the 1960s.
It has moist membranes. Many, but not all (urinary), secrete mucous. Serous: Lines open body cavities that are closed to the exterior body surface. composed of simple squamous epithelium resting on thin layer of areolar connective tissue.
Two main types of epithelium (by location) 1) covering and lining epithelium (external and internal surfaces) 2) glandular epithelium (Secretory tissue in glands) Where is epithelial tissue found? Covering and lining epithelium forms the outer layer of the skin (epidermis), dips into and lines the open cavities of the cardiovascular, digestive, and respiratory systems, and covers the walls of organs of the closed ventral body cavity. Glandular epithelium fashions the glands of the body. Glandular Epithelium.