Jan Swammerdam definition of Jan Swammerdam in the Free Online Encyclopedia.

Swammerdam, Jan

Born Feb. 2, 1637, in Amsterdam; died there Feb. 15, 1680. Dutch naturalist.

Swammerdam graduated from the University of Leiden in 1663. In 1667 he defended his dissertation on respiration in animals. His main works dealt with human and animal anatomy; his animal studies centered on insects, although he also studied mollusks, amphibians, and other animals. Swammerdam proposed classifying insects by subdividing them into four groups based on the characteristics of their metamorphosis. He supported the theory of preformation and rejected the possibility of spontaneous generation. He introduced a new preparation technique, developed many instruments used in making preparations, and performed the first intravascular injection. Swammerdam designed instruments to record cardiac output, respiratory movements, and muscular contractions following the stimulation of a nerve.

WORKS

Historia insectorum generalis. Utrecht, 1669.
Bybel der Natuure, vols. 1–2. Leiden, 1737–38.

REFERENCCE

Kholodkovskii, N. A. Ian Svammerdam. Berlin, 1923.

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No references found	In the mid-1660s, Jan Swammerdam, Johannes van Horne, and Niels Stensen independently arrived at this hypothesis, but failed to publish their work immediately. The Legacy of Reinier De Graaf by Jay, Venita / Archives of Pathology & Laboratory Medicine The heyday of the preformationists was roughly 1600-1800; they were led by such scientific luminaries as Paracelsus, Lazzaro Spallanzani, Jan Swammerdam, Charles Bonnet, Albrecht von Haller, and the famous Dutch naturalist Antoni van Leeuwenhoek, commonly credited with the invention of the microscope. The Ovary of Eve: Egg and Sperm and Preformation by Thomas, Joe A. / The Journal of Sex Research	Jan Michal Rozwadowski Jan Nalepka Jan Nálepka Jan Neruda Jan Ostrorog Jan Ostroróg Jan Otcenášek Jan Otcenasek Jan Parandowski Jan Paulus Lotsy Jan Pece Jan Ponican Ján Ponican Jan Porcellis Jan Remco Theodoor Campert Jan Rudzutak Jan Rutkowski Jan Siberechts Jan Sladky Jan Sladký Jan Sluijters Jan Smrek Ján Smrek Jan Stursa Jan Sverma Jan Swammerdam Jan Szczepanski Jan Tinbergen Jan van Goyen Jan Van Oldenbarneveldt Jan van Ruysbroeck Jan van Scorel Jan Vermeer Jan Zachwatowicz Jan Zamoyski Jan Zelivsky Jan Zizka Jan Zrzavy Jan Zrzavý Janácek, Leoš Janacek, Leos Janácek, Leos Janaki Navami Janauschek, Fanny Jane Austen Jane Doe Jane Frances de Chantal and Francis de Sales, Sts Jane Seymour Janecke coordinates Janes Island State Park Janesville	Ján Ponican Jan Porcellis Jan Primus Jan Remco Theodoor Campert Jan Rudolf Thorbecke Jan Rudzutak Jan Rutkowski Jan Schouten Ján Selye Jan Sibelius Jan Sibelius Jan Siberechts Jan Sladky Jan Sladký Jan Sluijters Jan Sluyters Jan Smrek Ján Smrek Jan Smuts Jan Smuts Jan Sobesky Jan Sobesky Jan Sobieski Jan Sobieski Jan Sobieskis Jan Sobieskis Jan Steen Jan Stursa Jan Sverma Jan Swammerdam Jan Szczepanski Jan Tinbergen Jan Tinbergen Jan Tregeagle Jan Vaclav Stamitz Jan van der Meer Jan van Eyck Jan van Eyck Jan van Goyen Jan Van Haasteren Jan van Leiden Jan van Leyden Jan Van Oldenbarneveldt Jan van Ruysbroeck Jan van Ruysbroek Jan van Scorel Jan van Wynkyn Jan Vennegoor of Hesselink Jan Vermeer Jan Vermeer Jan Werner Data Processing Jan Zachwatowicz Jan Zamojski Jan Zamoyski Jan Zelivsky Jan Zizka Jan Zrzavy

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No references found

In the mid-1660s, Jan Swammerdam, Johannes van Horne, and Niels Stensen independently arrived at this hypothesis, but failed to publish their work immediately.

The Legacy of Reinier De Graaf by Jay, Venita / Archives of Pathology & Laboratory Medicine

The heyday of the preformationists was roughly 1600-1800; they were led by such scientific luminaries as Paracelsus, Lazzaro Spallanzani, Jan Swammerdam, Charles Bonnet, Albrecht von Haller, and the famous Dutch naturalist Antoni van Leeuwenhoek, commonly credited with the invention of the microscope.

The Ovary of Eve: Egg and Sperm and Preformation by Thomas, Joe A. / The Journal of Sex Research