>>13791573>No that's not itIt's exactly that. The first two pictures you posted are of a mouse, and specifically the dentate gyrus, which part of the hippocampus. A mouse brain is small, the hippocampus is smaller, and the dentate gyrus is smaller still. The third picture is of drosophila, which is tiny to being with.
It's just the fact that you're looking at it under a microscope. That's literally all. You won't be able to see them with the naked eye.
That said, feel free to post more. I enjoy these pictures.