Spermatogenesis of Normal and of Hybrid Pigeons PDF ePub eBook

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Spermatogenesis of Normal and of Hybrid Pigeons free pdf Excerpt from Spermatogenesis of Normal and of Hybrid Pigeons: A Dissertation, Submitted to the Faculty of the Graduate School of Arts, Literature, and Science, in Candidacy for the Degree of Doctor of Philosophy- Department of Zoology The present study on the spermatogenesis of normal pigeons is based largely on material obtained from two species, viz: Columba livia domestica, the common pigeon, and Turtur risorius, the ring dove. Other species were studied for comparison. The particulars of the hybrid material will be given in detail in the latter part of this paper. A description of the various phases undergone by the germ cells in their transformation from spermatogonia to mature spermatozoa is all that has been attempted in the present paper. It was intended originally to investigate also the origin of the spermatogonia and of the supporting or Sertoli cells, but it speedily became evident that such a study is a complicated problem in itself which must be postponed for the time being. On account of the comparative ease of manipulation and the abundance of material that can be secured at any time, the pigeon is in some ways well adapted to the study of spermatogenesis, but the small size of the cells makes a very high microscopic power necessary to obtain satisfactory results, and even then the cytoplasmic structure is insufficiently disclosed. So far, it seems that no investigations upon the spermatogenesis of the pigeon have been recorded. A few scattering observations have been recorded. A few scattering observations have been made upon the spermatozoa, but the subject has been, in the main, untouched. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully- any imperfections that remain are intentionally left to preserve the state of such historical works.

About Michael F Guyer

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Details Book

Author : Michael F Guyer
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1332069568
EAN : 9781332069569
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 66 pages
Age + : 15 years
Language : English
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  • Spermatogenesis of Normal and of Hybrid Pigeons free pdfSpermatogenesis of Normal and of Hybrid Pigeons

    Free Book Online To Read. Excerpt from Spermatogenesis of Normal and of Hybrid Pigeons: A Dissertation, Submitted to the Faculty of the Graduate School of Arts, Literature, and Science, in Candidacy f