And within this structure, you see these two pinkish layers, which are actually the muscle.

The one on the right comes from a yellow surface, in shadow, oriented facing the left, viewed through a pinkish medium.

Now the brain may not look like much from the outside a couple pounds of pinkish gray flesh, amorphous but the last hundred years of neuroscience have allowed us to zoom in on the brain, and to see the intricacy of what lies within.