GENERAL HISTOLOGY

Detailed explanation-1: -Tight junctions are the closely associated areas of two cells whose membranes join together to form a virtually impermeable barrier to fluid. Tight junctions perform vital functions-such as holding cells together-and form protective and functional barriers.

Detailed explanation-2: -Tight junctions, or zonula occludens (ZO), are characteristic of epithelial and endothelial cells (Figure 1). Located at the border between apical and lateral membranes, tight junctions regulate the passage of proteins and liquids across the cell monolayer.

Detailed explanation-3: -Elaborate occluding junctions between adjacent Sertoli cells form an intercellular barrier that is completely impermeable even to small molecules.

Detailed explanation-4: -Tight junctions, also known as Zonula Occludens, are cell-cell adhesion complexes that play a role in the organization of epithelial tissue.