The Purkinje cell in the cerebellum |
A resource kit for elementary and secondary education teachers and students was published in pdf and here you can see the reproductions of some of the original drawings by Cajal as well as lesson plans to use in the classroom (C2 Level). Cajal's drawings inspired artists like Dalí, Miró or Tanguy.
Santiago Ramón y Cajal is considered the father of neuroscience, he was awarded the Nobel prize for Medicine in 1906, and he was a fine artist too. Here you can find a link to Cajal's Wikipedia page.