You could try to explain how a human brain works or you could as well make things more explicit with this human brain vector design that tries to do just that.
Human brain, how is working vectors
5 EPS marketing vectors with JPG preview – 3 Mb – Human brain vector concepts
These cool vectors are very good for business cards, to create Photoshop layered design with actions, for brushes and patterns, brochures and flyers, fashion design, logos and icons, web-design, or labels and stickers and so on.
License: You can use Human brain, how is working vectors for personal or educational purposes.