What type of epithelial tissue is characterized by multiple layers of cells?

The key characteristic of stratified squamous epithelial tissue is that it consists of multiple layers of cells stacked upon one another. This structure provides a protective barrier, making it particularly effective in areas subject to abrasion and wear, such as the skin, the lining of the mouth, and the esophagus. The multiple layers help to resist mechanical stress and prevent the loss of fluids and other substances.

In contrast, the other types of epithelial tissue mentioned do not have this multiple-layer configuration. Simple squamous, simple cuboidal, and simple columnar tissues consist of a single layer of cells. Simple squamous is ideal for processes like diffusion and filtration due to its thinness, simple cuboidal is typically involved in secretion and absorption in glands, and simple columnar is specialized for absorption and secretion, particularly in areas like the gastrointestinal tract. Each of these tissues serves different functions in the body, but it is the stratified squamous epithelial tissue that is specifically known for its multiple layers.