Neurons square measure cells at intervals the system that transmit data to different nerve cells, muscle, or secreter cells. Most neurons have a cell body, an axon, and dendrites. The cell body contains the nucleus and protoplasm. The nerve fiber extends from the cell body and sometimes offers rise to several smaller branches before ending at nerve terminals. Dendrites extend from the somatic cell cell body and receive messages from different neurons. Synapses square measure the contact points wherever one somatic cell communicates with another. The dendrites square measure coated with synapses shaped by the ends of axons from different neurons. The brain is what it's due to the structural and useful properties of interconnected neurons. The class brain contains between one hundred million and one hundred billion neurons, betting on the species. every class somatic cell consists of a cell body, dendrites, ANd an nerve fiber.