Human brain contains ~ 100 billion (10¹¹) neurons.

• ~~ thousand of synapses per neuron.

Neuron

A neuron is a cell like any other cell in the body.

It has a cell body and a nucleus just like any other cell in our body.

The thing that's distinctive about a neuron is that it has:

• a big long process called an axon
• a bunch of dendrites, the little processes near the cell body.

At the tip of the axon, that's the classic neuron.

Many neurons have a myelin sheath, a layer of rolled up fat around the axon made up of other cells.

• That makes the axon conduct neural signals faster.