Little is a lot

I guess you have already used this webpage. I advised you to used it when we studied the respiratory system. Here you have the link to the school.co webpage. In this page you'll be able to study most of the nervous system even some sense organs.
The explanation is with drawings and texts that you can be listening at the same time. So it's not difficult to understand and if you don't know a word you can look it up in the diccionary.