Hello everyone!
I have done few blackboard backgrounds for my story, I needed some biology exercices for University students. Because I think many of us are tired of the mathematic blackboard (which is not even accurate for highschool students), I wanted to give the community my biology backgrounds. Also, because it’s really quick to do, I can create customized blackboard backgrounds (with the official blackboard background of Episode that I used for mine) if you want to 
If you are interested, you can reply to this tread with the details, my only condition is that each background I create will be post here and usable by everyone, for free and no need for credits.
I don’t have time to create complex backgrounds or overlays, or even art scenes, but I really wanted to contribute to the community on my level 
I didn’t need the scientific part to be extremely accurate, so there are probably mistakes.
I recognize these diagrams, as I’ve taken a class in anatomy and physiology lol 