Epithelium is one of four basic tissue types in the body from which all organs are constructed.
Identify the other 3 basic types 2. Epithelium is a tissue which is composed of sheets of individual cells which are polarized into apical, basal and lateral surfaces. Identify the other tissue components or spaces which each surface faces. Describe the structural features that distinguish each of these surfaces. Epithelium is a tissue in which the cells are attached to each other on their lateral surfaces by junctional complexes.