Definitions for "Tight junction"
Ribbon-like bands connecting adjacent epithelial cells that prevent leakage of fluid across the cell layer. ( Figure 15-28)
Cell-cell junction that seals adjacent epithelial cells together, preventing the passage of most dissolved molecules from one side of the epithelial sheet to the other.
A junction between epithelial cells, in which there is no gap whatever between the adjacent cells. Materials may get through a tight junction only by entering the epithelial cells themselves.