. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Fig. 1. Diagrammatic representation of reproductive tracts explanted at 17+ days. A: tract at the time of explantation; B, C, D, E, F: tracts cultured for 4 days. B: with both testes present the seminal vesicles and prostate glands developed. C: without testes the Wolffian ducts retrogressed, no seminal vesicles appeared but a few prostatic buds developed. D: with one testis (left in place or detached and replaced) the results were as in B in 5 out of 6 explants. E: with one testis, placed at a gr
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. Fig. 1. Diagrammatic representation of reproductive tracts explanted at 17+ days. A: tract at the time of explantation; B, C, D, E, F: tracts cultured for 4 days. B: with both testes present the seminal vesicles and prostate glands developed. C: without testes the Wolffian ducts retrogressed, no seminal vesicles appeared but a few prostatic buds developed. D: with one testis (left in place or detached and replaced) the results were as in B in 5 out of 6 explants. E: with one testis, placed at a greater distance from the opposite side of the tract, the Wolffian duct on the gonadless side retrogressed somewhat and the seminal vesicle was lacking or smaller in 8 out of 9 explants. F: with no testes but with testosterone micropellets added to the clot, the Wolffian ducts were retained and the seminal vesicles and prostatic buds developed as in B and D. M: Mullerian duct; W: Wolffian duct; S: seminal vesicles; P: prostate. Seminal Vesicles The development of seminal vesicles proved to be related to the age of the tract at the time of explantation as well as to the presence of hormone. In explants with testes, no seminal vesicles developed in tracts cultured at 15+ days; large dilatations with only a slight indication of a free seminal vesicle tip appeared in 9 out of 24 explants cultured at 16 + days; well-developed glands were found in 18 out of 19 explants of 17+ day-old tracts cultured when dilatations were present in the Wolffian ducts (Fig. 2, A), and within four days of culture they reached a length, in the best cases, equal to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ciba Foundation; Wolstenholme, G. E. W. (Gordon Ethelbert Ward). Boston, Little, Brown
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