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.
Epithelial Tissue. Squamous Epithelium Simple squamous epithelium is composed of a single layer of flattened cells, and therefore its protective function is not as significant as that of other epithelial tissues (Fig. 4.1) .It is found in areas where secretion, absorption, and filtration occur.n internal surfaces, epithelial tissue protects, but it also may have an additional function. For example, in the respiratory tract, epithelial tissue sweeps up impurities by means of cilia. Along the digestive tract, it secretes mucus, which protects the lining from digestive enzymes.