Outlines Of Chordate Development By William E Kellicott

Author : William E. Kellicott
Publisher :
ISBN 13 : 9781331928409
Total Pages : 482 pages
Book Rating : 4.9/5 (284 download)

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Download or read book Outlines of Chordate Development (Classic Reprint) written by William E. Kellicott and published by . This book was released on 2015-07-21 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Outlines of Chordate Development In these "Outlines" the student is introduced to the study of Chordate development through the embryological history of Amphioxus. Whether or not Amphioxus represents a truly primitive type of development, it affords, in simple diagrammatic style, the essentials of early Chordate ontogeny. In many respects the later phases of its history are highly modified, but this need be no objection to its use as an introductory type, since it may serve immediately to put the student upon his guard against a too exact phylogenetic interpretation of embryological facts. Following this is a rather full account of the development of the frog, a form that represents, better than any other single type, what we may regard as the general type of Chordate development. The chapters on the chick are relatively briefer and emphasis is laid upon the embryonic membranes, and upon the early phases of development, which represent the most frequent modifications of the type of Chordate development, modifications correlated with the presence of the large yolk accumulation of the Sauropsid ovum. It is believed that the chapters on the frog and chick have been written in such a way that either form may be omitted, in a brief course of study. Or in case the study of the early development of the frog is desired as a comparative introduction to the study of the embryology of the chick, Chapter III, on the organogeny of the frog, may be omitted without serious interruption of the continuity of such a course. The final chapter on the Mammal includes only those phases of development that arc of chief interest to the general student, namely, the earlier stages in the formation of the embryo, the establishment of its relation with the maternal organism, the development of the embryonic membranes and appendages, and the development of the external form of the human embryo. 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.