What Are Epithelial Tissues?
Epithelial tissues are widespread throughout your body. They cover all body surfacesinside and outand are major tissues of glands. Because epithelium covers organs, forms the inner lining of body cavities, and lines hollow organs, it always has a free surfaceone that is exposed to the outside or to an open space internally. Unlike many tissues, you get to actually see a lot of epithelial tissue every day in your skin. In fact, your skin is the largest organ of your body so its epithelial tissues cover the most ground. Skin epithilium is truly your first line of defense against the outside physical world, creating a barrier like none other found in the body. But epithelial tissues go much deeper than whats just out on the surface of your skin. Epithelial tissues encase your every part, including body cavities. They serve to protect, and they also perform other important duties, like secretion, absorption, and excretion. You can think of these tissues as windows and doors to your critica
