Titlebook: Space – Die Zukunft liegt im All; Sven Piper Book 2019 Der/die Herausgeber bzw. der/die Autor(en), exklusiv lizenziert an Springer-Verlag

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Sven Pipertion that there was a very well-developed secretory interstitium in the testes of pig embryos at the time of genital tract differentiation indirectly supported this notion. The idea of hormonal regulation of the process of sexual differentiation was given further impetus by studies of a phenomenon k

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Sven Piperive organ systems of animals-the endocrine and nervous systems. Although this science today reflects a fusion of endocrinology and neurobiology, this synthetic ap­ proach is relatively recent. At the beginning of the 20th century, when the British physiologists, Bayliss and Starling, first proposed

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ing. For several decades, the English physiologists prevailed, at least in the West; and Pavlov‘s critique was not taken to heart by the practitioners of the newly emerging discipline of endocrinology. Through the work of Harris, the Scharrers, Sawyer, Everett, and others, there has been something o

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Sven Pipervariable development of the internal genital tracts; and (e) the gonads are atrophic but resemble testes more than they resemble ovaries (Burns, 1961). To account for the occurrence of freemartinism, a “hormone theory” was devised by Keller and Tandler (1916) and by Lillie (1917). According to this

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