the tissue which forms the superificial layer of skin and some organs. It also forms the inner lining of blood vessels, ducts, body cavities, and the interior of the respiratory, digestive, urinary, and reproductive systems.
A layer of tissue that makes up the epidermis (outer layer of skin) which provides the skin with a tough, two-way barrier, keeping nutrients, water and body heat in, and unwanted chemicals and germs out.
The tissue that covers the internal and external surfaces of your body. Your skin, the linings of your eyes and nose, your entire digestive tract, your lungs, your urinary tract, and your reproductive tract are all epithelial tissue.
Groups of cells that cover or line external body surfaces (skin) or internal body surfaces such as hollow organs, and vessels. These tissues often contain cells that secrete substances that lubricate or take part in chemical reactions.