Tight junction | |
---|---|
![]() Diagram of tight junction | |
Details | |
Identifiers | |
Latin | junctio occludens |
MeSH | D019108 |
TH | H1.00.01.1.02007 |
FMA | 67397 |
Anatomical terminology |
Tight junctions, also known as occluding junctions or zonulae occludentes (singular, zonula occludens), are multiprotein junctional complexes between epithelial cells,[1], sealing and preventing leakage of solutes and water. They also play a critical role maintaining the structure and permeability of endothelial cells.[1] Tight junctions may also serve as leaky pathways by forming selective channels for small cations, anions, or water. The corresponding junctions that occur in invertebrates are septate junctions.