19th century specimen of a medicinal leech (Hirudo medicinalis) preserved in jar. Leeches are blood-sucking worms which were used to treat illnesses a

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19th century specimen of a medicinal leech (Hirudo medicinalis) preserved in jar. Leeches are blood-sucking worms which were used to treat illnesses ascribed to the patient having an excess of blood.

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Size: 2424px × 3635px
Photo credit: © GREGORY DAVIES/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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