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https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14016689
Blood cells (of a goose or guillemot): four figures. Ink and crayon, possibly by D. Gascoigne Lillie, ca 1906.
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Blood cells (of a goose or guillemot): four figures. Ink and crayon, possibly by D. Gascoigne Lillie, ca 1906.

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Blood cells (of a goose or guillemot): four figures. Ink and crayon, possibly by D. Gascoigne Lillie, ca 1906.

Original public domain image from Wellcome Collection

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