HISTORY OF ZOOLOGY 



33 



in capillaries, studies on glands, and his work on the structure and 

 metamorphosis of the silkworm take rank with outstanding con- 

 tributions to zoological knowledge. Numerous organs of the human 



Fig. 6. — Vesalius (1514-1564), pioneer anatomist. (From Locy, Growth of Biology, 



published by Henry Holt and Company, Inc.) 



body are named for this renowned scientist of his time. Like other 

 early microscopists, he had to build his own microscope. 



