Describe the main types of epithelial tissues found in animals and state one location for each type.

The main types of epithelial tissues include squamous epithelium (found in the lining of blood vessels and lung alveoli), cuboidal epithelium (found in kidney tubules and ducts of glands), columnar epithelium (found in the lining of the stomach and intestine), and stratified squamous epithelium (found in the skin). Each type is adapted for specific functions such as protection, absorption, secretion, and filtration.