There are ~100 - 10 000 synapses per Neuron.





Each mm3 of the brain contains ~ 300 MILLION synapses





Although you cannot see synapses you sure can "feel" them! How is that?

A great example of feeling your synapses is when you drink alcohol. Synapses get altered and it affects how information is processed in your brain. And that is why you didn't manage to make sense last time when you were drunk ;-)