An electrical synapse is like a doorway that facilitates the passive flow of ions and small molecules from the presynaptic to the postsynaptic cell. Unlike a chemical synapse, the pre- and postsynaptic cells are extremely close to each other, physically connected by gap junctions. In vertebrates, these junctions are made up of channel-forming proteins, connexons, consisting of precisely aligned connexins. These paired channels form a pore, connecting the cytoplasm of both cells. Ions from the presynaptic cell pass through the pore into the postsynaptic cell, resulting in instantaneous electrical signal transmission. In contrast, the chemical synapses show a characteristic delay due to the involvement of chemical messengers. Electrical synapses are seen in the heart, intestinal smooth muscle, retina, brain, and spinal cord to aid in rapid and coordinated responses. For instance, the pacemaker cells initiate the action potential at the hearts’ sinoatrial node, which instantaneously propagates to the adjacent cells coupled with electrical synapses. This rapid cell-to-cell impulse transmission allows for coordinated contraction of cardiac muscles, generating a heartbeat.