Synapse: This is the junction between two neurons where communication occurs. It's like the bus stop or train station in our city analogy.
Neuron: This is a nerve cell that transmits information throughout the body. In our city analogy, this would be equivalent to individual vehicles (buses, cars) moving along routes.
Axon: This is a long threadlike part of a neuron along which impulses are conducted from the cell body to other cells. It's like the roads or tracks on which our vehicles travel.