Highly specialized cells for the control and coordination are called neurons or nerve cells. These are the largest cells in the human body which contains dendrites, cell body, and axon.
Synapses are the contact points where one neuron communicates with another.
The cell body contains a nucleus, cytoplasm, and granules called Nissl's granules.
Cell body with the granules branches out to form dendrites.
Axon is usually longer segments extending from the cell body and terminates as axon terminal.