Observed in this manner, the brain's overall complexity is almost
beyond belief, said Smith. "One synapse, by itself, is more like a
microprocessor -- with both memory-storage and information-processing
elements -- than a mere on/off switch. In fact, one synapse may
contain on the order of 1,000 molecular-scale switches. A single human
brain has more switches than all the computers and routers and
Internet connections on Earth," he said.
http://www.sciencedaily.com/releases/2010/11/101117121803.htm
The human cerebrum contains just about 90 billion neurons, which speak with each other at intersections called neurotransmitters. Every neuron has a shape similar to that of a tree and is canvassed in branches called dendrites.
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