Well, these junctions are found in epithelial tissues such as lungs, bladder, intestines, stomach and organs. So these are the different types of organs that contain epithelial tissue that are basically connected via tight junctions. Now let's move on to the second type of intracellular junction known as our gap junction. So gap junctions are the connective tunnels that exist between adjacent cells. So these types of tunnels, these types of channels or gap junctions, allow the movement of different types of molecules and ions up to a certain size, usually up to 1000 deltons. So they allow molecules and ions up to a certain size to pass from one cell to the other cell.