gap junctions

Gap junctions are specialized connections between neighboring cells that act like tunnels, allowing small molecules, ions, and electrical signals to pass directly from one cell to another. This helps cells communicate quickly and coordinate their activities, such as in the heart where synchronized contractions are essential. These channels are formed by proteins called connexins, which create a channel that bridges the cell membranes. Gap junctions are vital for maintaining tissue function, enabling cells to share information efficiently, and responding collectively to changes in the body.