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Dorsal (A–C) and ventral (D–F) views of successfully and unsuccessfully perfused brains. In unsuccessfully perfused brains (A, B, D and E), congealed blood is clearly visible in blood vessels on the surface of the brains, and the brains have an overall yellowish or pinkish tinge. A well-perfused brain (C and F) shows no visible blood vessels and the tissue is white.
