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- His studies on embryos supplied important evidence for his views on the unity of organic composition among vertebrates, which he now defined in three parts: the law of development, whereby no organ arises or disappears suddenly, explaining vestiges; the law of compensation, stipulating that one organ can grow disproportionately only at the expense of another; and the law of relative position, stating that the parts of all animals maintain the same positions relative to each other.
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Isidore Geoffroy Saint-Hilaire was a French zoologist noted for his work on anatomical abnormalities in humans and lower animals. In 1824 Geoffroy joined his father at the National Museum of Natural History as an assistant naturalist, and, after taking his M.D. in 1829, he taught zoology from 1830
- The Editors of Encyclopaedia Britannica
Author abbrev. (zoology) I. Geoffroy. Isidore Geoffroy Saint-Hilaire (16 December 1805 – 10 November 1861) was a French zoologist and an authority on deviation from normal structure. In 1854 he coined the term éthologie ( ethology ).
- 16 December 1805, Paris
- Zoologist
- French
Feb 11, 2017 · Isidore Geoffroy Saint-Hilaire studied anatomy and congenital abnormalities in humans and other animals in nineteenth century France. Under the tutelage of his father, Étienne Geoffroy Saint-Hilaire, Isidore compiled and built on his father's studies of individuals with developmental malformations, then called monstrosities.
May 11, 2018 · GEOFFROY SAINT-HILAIRE, ISIDORE (b. Paris, France, 16 December 1805; d. Paris, 10 November 1861),zoology, acclimatization, zookeeping, natural history, teratology, transformism, evolution, Étienne Geoffroy Saint-Hilaire, Muséum National d’Histoire Naturelle, animal studies.
The discoveries of developmental biology and the emergence of "evo-devo" - a speciality that interprets the genetic control of embryonic development in the light of evolution - shed new light on Saint-Hilaire's work, which influenced embryology, evolutionary biology and palaeontology.
(December 16, 1805 – November 10, 1861) French zoologist. He created the term 'ethology', which is the branch of zoology consisting of studying animals in their natural habitats.
Isidore Geoffroy Saint-Hilaire studied anatomy and congenital abnormalities in humans and other animals in nineteenth century France. Under the tutelage of his father, Etienne Geoffroy Saint-Hilaire, Isidore compiled and built on his father's studies of individuals with developmental malformations, then called monstrosities.
