Stained epithelial cells by Page Baluch. View Citation You may need to edit author's name to meet the style formats, which are in most cases "Last name, First name. Modern Language Association, 7th Ed.
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Cuboidal epithelial cells , as their name suggests, are shaped like cubes. These are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands. Columnar epithelial cells are long and thin, like columns. These are usually found in places that secrete mucus such as the stomach. Login Register. Additional recommended knowledge.
Topics A-Z. All topics. To top. About bionity. Your browser is not current. Microsoft Internet Explorer 6. Your browser does not support JavaScript. Epithelial tissue is classified based on the number of cells, the shape of those cells, and the types of those cells. Air sacs of the lungs and the lining of the heart, blood vessels and lymphatic vessels Allows materials to pass through by diffusion and filtration, and secretes lubricating substances Simple cuboidal epithelium.
In ducts and secretory portions of small glands and in kidney tubules Secretes and absorbs Simple columnar epithelium. Ciliated tissues including the bronchi, uterine tubes, and uterus; smooth nonciliated tissues are in the digestive tract bladder Absorbs; it also secretes mucous and enzymes.
Pseudostratified columnar epithelium. Ciliated tissue lines the trachea and much of the upper respiratory tract Secrete mucous; ciliated tissue moves mucous Stratified squamous epithelium. Lines the esophagus, mouth, and vagina Protects against abrasion Stratified cuboidal epithelium.
Sweat glands, salivary glands, and mammary glands Protective tissue Stratified columnar epithelium. The male urethra and the ducts of some glands. Secretes and protects Transitional epithelium.
Lines the bladder, urethra and ureters Allows the urinary organs to expand and stretch Types of Epithelial Tissue Epithelial tissue is classified by cell shape and the number of cell layers. Most epithelial tissue is described with two names. The first name describes the number of cell layers present and the second describes the shape of the cells. For example, simple squamous epithelial tissue describes a single layer of cells that are flat and scale-like in shape. Epithelial Tissue : There are three principal classifications associated with epithelial cells.
Squamous epithelium has cells that are wider than they are tall. Cuboidal epithelium has cells whose height and width are approximately the same. Columnar epithelium has cells taller than they are wide.
Simple epithelium consists of a single layer of cells. They are typically where absorption, secretion and filtration occur. The thinness of the epithelial barrier facilitates these processes. Simple epithelial tissues are generally classified by the shape of their cells. The four major classes of simple epithelium are: 1 simple squamous; 2 simple cuboidal; 3 simple columnar; and 4 pseudostratified.
Figure 3 : The alveoli of the lungs, which are made up of simple squamous epithelial tissue labeled alveolar epithelium in the image. In addition, simple squamous epithelium lines the cavities, which arise from the coelom of the mesoderm i. Figure 4: Endothelial tissue of a blood vessel. Ackerley, S. Epithelial Tissue. Alberts B. The Molecular Biology of The Cell 4th ed.
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