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.
Serous membrane. The epithelial membrane that lines the closed ventral cavities of the body; makes up the pleura and pericardium. thin layer of tissue that covers internal body cavities and secretes a fluid that keeps the membrane moist; also called serosa. Parietal Peritoneum.