The endothelium is the epithelial tissue that lines vessels of the lymphatic and cardiovascular system, and it is made up of a single layer of squamous cells. The mesothelium is a simple squamous epithelium that forms the surface layer of the serous membrane that lines body cavities and internal organs.Click to see full answer. Subsequently, one may also ask, where is simple squamous epithelium found in the body?Simple squamous epithelia are found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance.Similarly, what is the difference between simple squamous epithelium and stratified squamous epithelium? Number of Cell Layers A major difference between simple squamous epithelium and stratified squamous epithelium is that the simple squamous epithelium contains a single cell layer while stratified squamous epithelium contains several cell layers. Hereof, what is simple squamous epithelium function? Simple squamous epithelium This type of epithelia lines the inner surface of all blood vessels (endothelium), forms the wall of alveolar sacs in the lung and lines the body cavities (mesothelium). The primary function of simple squamous epithelia is to facilitate diffusion of gases and small molecules.What is the epithelium?p?ˈθiːli?m/) is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs.