Experimental Embryology (Classic Reprint)
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Jenkinson, John W.) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Experimental Embryology For the biologist there are, I conceive, in the main two problems. One is to give an account of those activities or functions by means of which an organism maintains its specific form in an environment. The other is to find the causes which determine the production of that form, whether in the race or in the individual. The solution of the first of these problems is the business of physiology, in the usual sense of the term. The second falls to morphology. It is with the origin of form that we are here concerned, and in particular with its origin in the individual. The endeavour to discover by experiment the causes of this process - as distinct from the mere description of the process itself - is a comparatively new branch of biological science, for Experimental Embryology, or, as some prefer to call it, the Mechanics of Development (Entwicklungsmechanik), or the Physiology of Development, really dates from Roux´s production of a half-embryo from a half-blastomere, and the consequent formulation of the ´Mosaik-Theorie´ of self-differentiation. That hypothesis has been the focus of much fruitful criticism and controversy, the experiment has been followed by many others of the same kind, and the present volume is an attempt to sketch the progress of these researches and speculations on the nature and essence of differentiation, as well as of those which deal with growth, cell-division, and the external conditions of development. In writing this review I have had the very great advantage of an excellent model in the textbook of Korschelt and Heider (Lehrbuch der vergleichenden Entwicklungsgeschichte der wirbellosen Thiere, Allgemeiner Theil, Jena, 1902). 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.
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