Swammerdam, Jan Jacbz 1637-1680
Swammerdam was a Dutch doctor, naturalist and microscopist.
He neglected his medical practice to investigate the life history of insects and the anatomy of mayflies, frogs and bees. He advanced the study of the human circulatory system and was the first to describe red blood corpuscles (1658). He studied movements of heart, lungs and muscles. His work was published after his death under the title The Bible of Nature.