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.
Explore Visual Aids, Cavities, and more! Epithelia tissue covers the body surfaces, lines body cavities, forms external and internal linings of many organs, and constitutes glands. It has many different forms for its many functions: protection, secretion, excretion, absorption, filtration, and sensation. Each type of epithelial tissue will be outlined in detail. See More