- invertebrates: one layer of cells: simple epithelium (enkelskiktat) - vertebrates: one, two or more layers: stratified epithelium (flerskiktat) and on the basis of form: -flat: squamous epithelium (skivepitel) -cube shaped: cuboidal epithelium (kubiskt epitel) -column like: columnar epithelium (cylinderepitel) The apical side can have: -cilia

7508