Concept:A tissue can be defined as a group of one or more types of cells having the same origin and specialized for specific functions along with the intercellular materials.These tissues are organized to form an organ like the stomach, lung, heart, and kidney.Explanation:Due to an accident, the delicate lining of the mouth and the oesophagus of a person is injured. In this case, Squamous epithelium tissues will be affected.The Squamous (Squama-scale) is formed of a single layer of closely fitted, flattened, polygonal cells, which form bulges on the cell surface.Squamous epithelium tissues are found in the lining of the mouth, oesophagus, and including blood vessels and the alveoli of the lungs.Function: Simple squamous epithelium performs the function of protection, excretion, gas exchange and secretion of coelomic fluid.Additional InformationSmooth muscle: Smooth muscles are found in the posterior part of oesophagus, stomach, intestine, lungs, urinogenital tract, etc.The smooth muscles help in the peristalsis which occurs in the tubular viscera.Cuboidal epithelium:It is composed of a single layer of cube-like cells.The simple cuboidal epithelium is commonly found in the ducts of glands, tubular parts of nephrons in kidneys, ovaries, etc.The main function of this epithelium is protection, secretion absorption, excretion, and gamete formation.Striated muscle:The striated muscles form about 40% of total body weight.These muscles are attached and bring about the movement of the various bones of the skeleton.