Surface view of "simple" squamous epithelium. From this angle, it is dfficult to assess if the tissue is simple or stratified.
Simple squamous epithelium from a side view. Note the thinness of tissue. This tissue makes the Bowman's capsule of the glomerulus of the kidney (shown) as well as blood and lymphatic capillaries and the alveoli of the lungs.
Simple cuboidal epithelium often forms tubules as in this view of the kidney. Think tubes and cubes. Other tissues can make tubes as well.
Simple columnar epithelium is the principle tissue of the alimentary canal between the esophagus and anus.
Simple columnar epithelial tissue as a duct. Note the arrows.
Pseudostratified Columnar Epihtelium with cilia. Most of this tissue is ciliated and is the principle epithelium of the conducting zone of the respiratory system. It can also be found in the male reproductive system.