Science Art: Neuron Matrix, by Nicolas P. Rougier

Scientific illustration of a neuron, a brain cell, being electrifying. By Nicolas P. Rougier

Scientific illustration of a neuron, a brain cell, being electrifying. By Nicolas P. RougierClick to embiggen slightly

A nerve, an electric cell, a node in a network.

A place and size where electricity meets chemistry inside our bodies. This appears to be an illustration of synapses communicating (sending out chemicals/electrical signals) drawn over a scanning-electron microscope image. Can’t say for sure – there’s no info on Wikimedia Commons other than the name and the author.