Experimentelle Beiträge Zu Einer Theorie Der Entwicklung. Embryonic Development and Induction PDF Download
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Author: Hans SPEMANN
Publisher:
ISBN:
Category :
Languages : en
Pages : 401
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Book Description
Author: Hans SPEMANN
Publisher:
ISBN:
Category :
Languages : en
Pages : 401
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Book Description
Author: Scott F. Gilbert
Publisher: Springer Science & Business Media
ISBN: 1461568234
Category : Science
Languages : en
Pages : 273
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Book Description
"Glory to the science of embryology!" So Johannes Holtfreter closed his letter to this editor when he granted permission to publish his article in this volume. And glory there is: glory in the phenomenon of animals developing their complex morphologies from fertilized eggs, and glory in the efforts of a relatively small group of scientists to understand these wonderful events. Embryology is unique among the biological disciplines, for it denies the hegemony of the adult and sees value (indeed, more value) in the stages that lead up to the fully developed organism. It seeks the origin, and not merely the maintenance, of the body. And if embryology is the study of the embryo as seen over time, the history of embryology is a second-order derivative, seeing how the study of embryos changes over time. As Jane Oppenheimer pointed out, "Sci ence, like life itself, indeed like history, itself, is a historical phenomenon. It can build itself only out of its past. " Thus, there are several ways in which embryology and the history of embryology are similar. Each takes a current stage of a developing entity and seeks to explain the paths that brought it to its present condition. Indeed, embryology used to be called Entwicklungsgeschichte, the developmental history of the organism. Both embryology and its history interpret the interplay between internal factors and external agents in the causation of new processes and events.
Author: Joseph Needham
Publisher: Cambridge University Press
ISBN: 1107475546
Category : Medical
Languages : en
Pages : 337
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Book Description
First published in 1959, this book describes the Western history of embryology from prehistoric concepts of foetal growth to the close of the eighteenth century.
Author: Ernst Mayr
Publisher: Harvard University Press
ISBN: 9780674272262
Category : Biology
Languages : en
Pages : 524
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Book Description
Biology was forged into a single, coherent science only within living memory. In this volume the thinkers responsible for the "modern synthesis" of evolutionary biology and genetics come together to analyze that remarkable event. In a new Preface, Ernst Mayr calls attention to the fact that scientists in different biological disciplines varied considerably in their degree of acceptance of Darwin's theories. Mayr shows us that these differences were played out in four separate periods: 1859 to 1899, 1900 to 1915, 1916 to 1936, and 1937 to 1947. He thus enables us to understand fully why the synthesis was necessary and why Darwin's original theory--that evolutionary change is due to the combination of variation and selection--is as solid at the end of the twentieth century as it was in 1859.
Author: Marcus Jacobson
Publisher: Springer Science & Business Media
ISBN: 1475749546
Category : Science
Languages : en
Pages : 782
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Book Description
This consistent and well-illustrated text is an up-to-date survey of cellular and molecular events contributing to the assembly of the vertebrate nervous system. Chapters include a mixture of historical content and descriptions from literature that best illustrate specific aspects of development.
Author: Aron Arthur Moscona
Publisher: Academic Press
ISBN: 0121531112
Category : Cell differentiation
Languages : en
Pages : 236
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Book Description
CURRENT TOPICS DEVELOPMENTAL BIOLOGY V11.
Author: Elliott M. Blass
Publisher: Springer Science & Business Media
ISBN: 1475749511
Category : Medical
Languages : en
Pages : 567
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Book Description
In our attempts to interrogate Nature about the development of the nervous system, we ask such questions as "How do the nerve cells originate and how do the correct types of cells differentiate at their correct positions; how do the neurons link together to form circuits whose functions are properly coordinated; and how are the functions of nerve cells related to behavior, to thought, and to conscious ness?" Those problems are intellectually challenging, not only because solving them would give us practical advantages but also because while they remain unsolved they stimulate the imagination and challenge the intelligence. It is precisely because they are difficult and controversial and have defied complete solution that such problems continue to attract subtle minds. The understanding that we now have of neural ontogeny seems to me to be farther from complete knowledge than from total ignorance. Nonetheless, it gives us a slightly elevated position from which to survey the vicissitudes of the past, to appraise our present understanding, and to consider ways in which our knowl edge might develop in the future. The history of this subject affords a particularly piquant illustration of Arthur Lovejoy's comment that the "adequate record of even the confusions of our forebears may help, not only to clarify those confu sions, but to engender a salutary doubt whether we are wholly immune from different but equally great confusions.
Author: Viktor Hamburger
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 216
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Book Description
Here is a critical account of the experimental work of German biologist and Nobel laureate Hans Spemann, one of the founders of experimental embryology. The author, a distinguished developmental biologist, spent almost a decade in Spemann's laboratory. He examines Spemann's work and traces the different lines of investigation which emerged from his mentor's seminal research, and laid the foundation for modern cellular and developmental biology.
Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 704
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Book Description
First multi-year cumulation covers six years: 1965-70.
Author: Pieter D. Nieuwkoop
Publisher: CUP Archive
ISBN: 9780521251075
Category : Science
Languages : en
Pages : 436
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Book Description
This volume summarises our present knowledge of inductive interaction during early development of various groups of chordates. Embryonic development is mainly epigenetic, that is, each embryo arises through gradual organisation and emergence of its constituent parts and not by the unfolding of preformed structures. Development as far as the full development of the 'body plan' in the embryo is described. At the beginning of development, there is only very restricted spatial diversity, but as development proceeds the interaction of the different parts leads to ever-increasing spatial complexity of the developing embryo. Interaction starts between the different cell organelles of the oocyte and the, spermatozoon; it continues without interruption between the different parts of the very early embryo and also between the different tissues and organ anlagen of the developing embryo. The new hypothesis as to the nature of the inductive interaction, which is postulated here, is in good agreement with the experimental evidence presented and opens new possibilities for fruitful research into this basic concept of embryonic development.
