1926 poster depicts human as a chemical plant

"Man as Industrial Palace" was created by Fritz Kahn in 1926. A high-res scan is available from the "Dream Anatomy" gallery of the National Institutes of Health.

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Kahn's modernist visualization of the digestive and respiratory system as "industrial palace," really a chemical plant, was conceived in a period when the German chemical industry was the world's most advanced.

Link (Via Finkbuilt)