what are the different types of epithelial tissue?
['Simple. Simple epithelium consists of one layer of epithelial cells lying on a basement membrane. Cells can be squamous, cuboidal and columnar. ... ', 'Pseudostratified. Pseudostratified epithelium. ... ', 'Stratified. Stratified epithelium consists of two or more cell layers. ... ', 'Transitional. Urothelium.']