Grey and White Matter

Micrograph showing grey matter, with the characteristic neuronal cell bodies (right of image - darker pink), and white matter with its characteristic fine mesh work-like appearance (left of image - lighter pink).

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"Grey matter and white matter - very high mag."

https://en.wikipedia.org/wiki/File:Grey_matter_and_white_matter_-_very_high_mag.jpg Wikipedia CC BY-SA.