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Characteristics of Epithelial Tissue
Classification of Epithelial Tissue
Epithelial tissue is classified based on the number of cells, the shape of those cells, and the types of those cells.
This is a chart of the eight basic types of epithelium. It contains three columns, named cells, location, and function. Cell shapes and their arrangement of layers are used to classify epithelial tissues. The cells and their descriptions are: Simple squamous epithelium, located in the lungs and the lining of the heart, blood vessels, and lymphatic vessels are air sacs. They allow materials to pass through by diffusion and filtration, and secrete a lubricating substance. Simple cuboidal epithelium, located in the ducts and secretory portions of small glands and in kidney tubules, secrete and absorb substances. Simple columnar epithelium is ciliated tissue located in the bronchi, uterine tubes, and uterus. In the digestive tract and bladder, it is a smooth (nonciliated) tissue. Pseudostratified columnar epithelium is ciliated tissue that lines the trachea and much of the upper respiratory tract. It secretes and moves mucus. Stratified squamous epithelium lines the esophagus, mouth, and vagina and protects against abrasion. Stratified cuboidal epithelium, located in the sweat glands, salivary glands, and the mammary glands, is a protective tissue. Stratified columnar epithelium, located in the male urethra and the ducts of some glands, secretes and protects those areas. Transitional epithelium lines the bladder, urethra, and the ureters. It allows the urinary organs to expand and stretch.
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"ummary showing different epithelial cells/tissues and their characteristics.."
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