Jan Swammerdam

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Swammerdam, Jan

(yän vä`mərdäm), 1637–80, Dutch naturalist. He was a pioneer in the use of the microscope. Before he turned to religious contemplation his chief interest was the study of invertebrates. He investigated the life histories of frogs and of numerous insects, which he classified on the basis of their metamorphic development. He also made valuable observations on human anatomy and was probably the first to detect red blood cells (1658). A composite collection of his descriptions and of his accurate and exquisitely executed drawings was published posthumously (2 vol., 1737–38) and appeared in English as The Book of Nature (1758). He was an early and influential proponent of the theory of evolutionevolution,
concept that embodies the belief that existing animals and plants developed by a process of gradual, continuous change from previously existing forms. This theory, also known as descent with modification, constitutes organic evolution.
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, in opposition to the current belief in spontaneous generation.

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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lt;<Las transformaciones de Swammerdam, Malpighi y Leeuwenhoeck, sobresalientes observadores de nuestra epoca, me ayudaron aqui a admitir que el animal y toda otra substancia organizada no comienza en absoluto cuando creemos y que su generacion aparente es solo un desarrollo y una especie de aumento.
11) Matthew Cobb, <<Reading and wrinting The Book of Nature: Jan Swammerdam (1637-1680)>>, Endeavour, vol.
When this famous work, De Mulierum Organis Generatione Inservientibus, was published, a bitter confrontation ensued between De Graaf and Swammerdam, who accused De Graaf of taking credit for the discoveries of van Horne and himself.
Swammerdam was a committed ovist who deduced from his work on silkworms and other insects that humans existed fully formed, albeit in miniature, inside maternal ova.
through the Dark Ages (when the museological impulse sputtered amid relic-preserving convents and monasteries), and then through the seventeenth and eighteenth centuries, when the impulse flowered once again through such elite-serving collections as those of John James Swammerdam, Dr.
There was a Swammerdam, and there was an Olaus Worm with his Museum Wormianum; and Charles Willson Peale did have his museum in Philadelphia, to which Benjamin Franklin donated the carcass of an Angora cat and where you could also see a mastadon and mechanical devices like the Eidophusikon, which showed primitive movies.
The title story of the collection focuses on the friendship of two seventeenth-century historical figures, Jan Swammerdam and Niels Stensen, and their respective beliefs concerning the relationship between religion and science.
The Dutch naturalist Jan Swammerdam (1637-1680) studied insects under the microscope and collected some three thousand species of them, so that he is considered the father of modern entomology.
Esta misma idea, perspectivada desde lo que acontece en este ano 1676 podemos conectarlo con su visita a los microscopistas Swammerdam y Leeuwenhoek.
1658: Jan Swammerdam, a 21-year-old Dutch microscopist, is thought to be the first person to observe and describe red blood cells.
Red blood corpuscles had been known since Swammerdam had discovered them over two centuries before (see 1658).