The median wage, or midway point between the lowest and highest salary, was $116,010 per year. Twenty-five percent of marketing managers earned less than $83,290 per year while another 25 percent earned more than $155,050.
List five major functions of epithelium in the body, and give examples of each. 1. protection; epithelium covering body surface protects against bacterial invasion and chemical damage. 2. absorption; epithelium specialized to absorb substances lines the stomach and small intestines. 3. filtration; in kidney tubules, epithelium filters (and absorbs and secretes). 4. excretion; Sweat is excreted from the body by epithelial cells in the sweat glands. 5. secretion; In glands, epithelial tissue is specialized to secrete specific chemical substances such as enzymes, hormones and lubricating fluids.
Capillary walls for instance and the alveoli of the lungs are formed of this very thin tissue. Thinness is the hallmark of simple squamous epithelium, which allows diffusion of substances across the epithelial membrane.