Tight junctions, also known as occluding junctions or zonulae occludentes (singular, zonula occludens) are multiprotein junctional complexes. The function and structure of tight junctions is the main topic of discussion in this video. 0:00 Introduction 1:00 Tight Junctions 1:23 Location 1:37 Structure of Tight Junctions 2:46 Functions of Tight Junctions