Epithelial tissue is the tissue that covers surface areas of the body. There are three different types of epithelial tissue. Taken together they are called the epithelium. In any given region of the body, the epithelial tissue is arranged in certain...

Cells form tissues and tissues form organs. The several types of tissues in humans include nerve, muscle, blood, connective, reproductive and epithelial. Epithelial tissues are comprised of continuous sheets of cells that cover the body, line the...

Cilia, which are specialized arrangements of microtubules, have two general functions. They propel certain unicellular organisms, such as aramecium, through the water. In multicellular organisms, if cilia extend from stationary cells that are part of a...

One of the simplest tissues of the body. It comprises the cellular layer that forms the epidermis, the internal lining of the alimentary tract and the internal lining of ducts and hollow organs within the body such as the air passages of the lung and...

A layer of CELLS, also known as the epithelia, lining the outer surface of blood vessels and other tissues. See also: blood; blood-brain...

Large cells with small, round, or oval nuclei, they are derived from the ureters, bladder, and...

In biology and medicine, epithelium is a tissue composed of layers of cells that line the cavities and surfaces of structures throughout the body. It is also the type of tissue of which many glands are formed. Epithelium lines both the outside (skin)...