Tissue that forms the skin, glands, and the linings of the respiratory, gastrointestinal, urinary, and genital systems.
Epithelial cells arranged as a continuous sheet consisting of one or several layers.
Membrane that lines body canals, passages, and cavities.
Protective covering on body surfaces, such as the skin, mucous membranes, tissue inside the mouth, the lining of the heart, digestive and respiratory organs, and glands.