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These models (magnified 5,000 times) of the red blood cells of various animals were made by Dr H Welcker, Professor of Anatomy at Halle University, Germany. They were presented to Dr. John Struthers in 1871.
Comparative anatomy id the study of similarities and differences in the anatomy of different species of animals including humans. Throughout the 18th and 19th centuries, comparative anatomy was seen as a central part of medical education and training.