By James W. Overstreet (auth.), Jean André (eds.)

, Jean ANDRE Universite de Paris XI, ORSAY, France. Sperm cells have lengthy been regarded as the main hugely really good of all dwelling cells. They absolutely are, being very diversified, very complicated, containing organelles which don't exist in the other mobilephone -such as acrosome or crystallized mitochondria- and being endowed with a truly exact behaviour, that's to fulfill and realize the ovum, pierce its protecting envelopes and inject into its cytoplasm a Most worthy deposit, the haploid genome of the species. it really is Baccio Baccetti's benefit to have felt the necessity for a disagreement of the scientists engaged on sperm for you to make clear the plain complexity of the large quantity of data amassed at the topic. therefore, he effectively inaugurated the sequence of the InternationaZ Symposia on SpermatoZogy. The Seillac variation is the fourth within the sequence. After an preliminary level in which morphology was once principal, our conferences have became a growing number of in the direction of functionality. it's been the desire of the French Organizing Committee to commit this assembly often to Eutherians, and, between these, to guy, in reference to the conflicting prerequisites to assist the sterile and to contrul the inhabitants explosion on the floor of the world.

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Additional resources for The Sperm Cell: Fertilizing Power, Surface Properties, Motility, Nucleus and Acrosome, Evolutionary Aspects Proceedings of the Fourth International Symposium on Spermatology, Seillac, France, 27 June–1 July 1982

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Taylor NJ. This Symposium. 6. Cohen J, Werrett DJ. 1975. Antibodies and sperm survival in the female tract of the mouse and rabbit. J. Reprod. Fert. 42: 301-310. 7. Cohen J, Tyler KR. 1980. Sperm populations in the female genital tract of the rabbit. J. Reprod. Fert. 60: 213-8. 8. Pearson PL, Pawlowitzki IH, Geraedts JPM, Van der Ploeg M. 1974. Chromosome studies in human male gametes. In "The Biology of the male Gamete". BioI. J. Linn. Soc. 6. 9. Krzanowska H. 1974. The passage of abnormal spermatozoa through the uterotubal junction of the mouse.

Am. J. Med. 57, 761-766. 3. Leathem JH. 1977. In: Johnson AD, Gomes WR (eds). Y. 4. Honore LH. 1978. Gerontology 24, 58-65. 5. Harman SM. 1978. In: Schneider EL (ed). The aging reproductive system. Raven Press. Y. 6. B. 1978. Anat. Rec. 192, 513-518. 7. Nankin HR, Lin T, Murono EP, Osterman J. 1981. J. Androl. 24 2, 181-189. 8. Johnson L, Neaves WB. 1981. BioI. Reprod. 24, 703-712. 9. Schulze W, Schulze C. 1981. Cell Tissue Res. 217, 259-266. 10. Court ens J, Loir M. 1975. J. Microsc. BioI. Cell.

Fine structural studies have been carried out on Leydig cells both in humans (6,7) and Stallions (8), all of them mainly dealing with functional parameters, and on human Sertoli cells (9). Leydig cells appear increased both in number and in volume, in ageing stallions, decreased in humans concomitantly with a declining androgen status. Sertoli cells resume a high capacity to divide, and frequently give rise to binucleate cells. No informations are available concerning spermatozoa and spermatogenesis.

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