A Conceptual History of Modern Embryology by Frederick B. Churchill (auth.), Scott F. Gilbert (eds.)

By Frederick B. Churchill (auth.), Scott F. Gilbert (eds.)

"Glory to the technology of embryology!" So Johannes Holtfreter closed his letter to this editor while he granted permission to submit his article during this quantity. And glory there's: glory within the phenomenon of animals constructing their advanced morphologies from fertilized eggs, and glory within the efforts of a comparatively small team of scientists to appreciate those fabulous occasions. Embryology is exclusive one of the organic disciplines, for it denies the hegemony of the grownup and sees price (indeed, extra worth) within the levels that lead as much as the totally built organism. It seeks the beginning, and never purely the upkeep, of the physique. And if embryology is the examine of the embryo as visible over the years, the historical past of embryology is a second-order spinoff, seeing how the research of embryos adjustments through the years. As Jane Oppenheimer mentioned, "Sci­ ence, like lifestyles itself, certainly like heritage, itself, is a old phenomenon. it could actually construct itself merely out of its earlier. " therefore, there are a number of ways that embryology and the historical past of embryology are comparable. each one takes a present degree of a constructing entity and seeks to provide an explanation for the trails that introduced it to its current situation. certainly, embryology was known as Entwicklungsgeschichte, the developmental heritage of the organism. either embryology and its historical past interpret the interaction among inner components and exterior brokers within the causation of latest methods and events.

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Mag. Nat. Hist. S. 4, 11:430. This brief article was simply an 89. 90. 91. 92. 93. 94. 95. English announcement of Haeckel's two-volume work on Calcispongiae, which appeared the preceding year in German. Analytically is italicized by Haeckel, synthetically is italicized by the author. Haeckel, K, 1874, Die Gastraea-Theorie, die phylogenetische Classification des Thierreichs und die Homologie der Keimbliitter, Jenaische Zeitschr. 8:1-55. Balfour, F. , 1876, On the origin and history of the urinogenital organs of vertebrates, J.

P. 1962; Brian Bracegirdle, 1978, A History of Microtechnique, Cornell University Press, Ithaca, New York, pp. 76-81. , Vol. 4, p. 1966. Adelmann, 1966, Vol. 4, p. 2240. Muller, J. , 1829, Ueber die Wolffschen Kiirper bei den Embryonen der Friische und Kriiten, Arch. Anat. , Jhg. 1829, pp. 65-70, and Muller, 18'30, Bildungsgeschichte der Genitalien aus anatomischen Untersuchungen an Embryonen des Menschen und der Thiere, Dusseldorf. In 1829 and 1830 Muller made substantial modifications to the sequence envisioned by Rathke.

Phys. 10:17-48. See particularly Balfour's comments on the relationship between the Wolffian duct in birds and selachians (pp. 46-48). , 1883, Die Entstenhung der Sexualzellen bei den Hydromedusen. Zugleich ein Beitrag zur Kenntniss des Baues und der Lebenserscheinungen dieser gruppe, Gustav Fischer, Jena: for a recent analysis of this trend, see Churchill, 1987; Churchill, F. , 1985, Weismann's continuity of the germ-plasm in historical perspective, Freiburger Universitdtsbldtter, Heft 87/88:107-124; and, 1986, Weismann, Hydromedusae, and the biogenetic imperative: A reconsideration, in: A History of Embryology, (Horder, T.

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