"It is not haram to draw such pictures for the purpose of education through illustration. The intent of the law prohibiting images was that in pagan times, it was a direct means and way to shirk(associating other beings with Allah).
In other words, these things were only forbidden because they served as direct means and avenues to shirk. Therefore, if there is not even the remotest possibility of shirk, there is no reason to consider it as haram, especially if there are tangible benefits in drawing them."
[link]may Allah guide us all.