Well, it's basically a special type of muscle cell known as the cardiac cell, the cells found in our heart. So gap junctions are found in muscle tissues such as cardiac cells, and there they play an important role in allowing calcium ions to move across our cells, which basically propagates the action potential from one cell to the next cell. And this ultimately causes the heart to contract and that creates our heartbeat, which pumps our blood through the body. And we'll talk more about this when we discuss the cardiovascular system and the heart. The final connection, the final intracellular junction that we want to discuss are desmosomes. So what exactly is a desmosome and what is the purpose of the desmosome connection?