"I have often endeavoured to view the circulation of the blood in terrestrial animals, but without success, by reason that no parts of their bodies were sufficiently transparent."

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About Antonie van Leeuwenhoek

Antonie van Leeuwenhoek was a Dutch scientist and microscopist widely regarded as a founder of microbiology. His microscope observations described microorganisms, blood cells, and sperm cells with unprecedented detail for his era.

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