Synaptic vesicles inside a neuron
This pseudocolored image taken with a scanning electron microscope shows an axon terminal that was broken open to reveal synaptic vesicles (blue and orange) inside the neuron.
Source
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"OpenStax College, How Neurons Communicate. October 17, 2013."
http://cnx.org/content/m44748/latest/Figure_35_02_06.jpg
OpenStax CNX
CC BY 3.0.
