<unk> s (or zonula<unk>  are protein complexes that occur at cell-cell junctions in epithelial tissues, usually more basal than tight junctions.
They can appear as bands encircling the cell (zonula<unk>  or as spots of attachment to the extracellular matrix (adhesion plaques).
Adherens junction
Tight junction
Basolateral membrane
Internal elastic lamina
Apical membrane
Gap junction
Hemidesmosome
Reticular fiber