Normentafeln zur Entwicklungsgeschichte der Wirbelthiere: Kerr, J.G. Develop. of Lepidosiren and Protopterus. 1909 PDF Download

Author: Franz Keibel
Publisher:
ISBN:
Category : Anatomy, Comparative
Languages : en
Pages : 54

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Author: Library of Congress
Publisher:
ISBN:
Category : Catalogs, Union
Languages : en
Pages : 714

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Author: Ruth Bellairs
Publisher: Elsevier
ISBN: 0080454755
Category : Science
Languages : en
Pages : 495

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This outstanding work is the only modern book devoted to the chick embryo and has been an essential resource for geneticists, molecular and developmental biologists, and other life scientists who use the chick embryo as their research model. This new enlarged and updated second edition is published in response to continuing demand. The text provides a detailed description of development, from fertilization to hatching, with emphasis on the earlier stages though also covering individual organ systems in detail. There are reviews of the more recent molecular research and a new section highlighting the important landmarks in the history of chick embryology which have had an impact on our understanding of developmental processes. The book is beautifully illustrated with 74 text-figures and over 500 photographs, including nearly 200 new scanning electron micrographs. Updated and expanded text to accompany diagrams More than 200 new labelled scanning electron micrographs showing individual tissues in great detail Reviews of recent molecular research Discusses the roles of genes such as Hox genes, BMPs, and sonic hedgehog during early development New sections on genetical anomalies, techniques, and the poultry industry

Author: Thomas Hunt Morgan
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 794

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Experimentelle Embryologie.

Author: Emil Witschi
Publisher:
ISBN:
Category : Embriología
Languages : en
Pages : 612

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Author: A.A.M. Gribnau
Publisher: Springer
ISBN: 9783540104698
Category : Medical
Languages : en
Pages : 86

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In the past decennia nonhuman primates have been increasingly used for research purposes in various scientific fields. Much interest has been focused on this group of animals in general and on the rhesus monkey in particular because of its close phylo genetic relationship with man. In some fields of research, however, such as embryology and microscopic anatomy, much less attention has been paid to nonhuman primates, probably because of the expense involved in the collection of the extensive material needed. On the other hand, teratological and experimental embryologic studies must be based upon a thorough knowledge of the normal ontogenesis since only in that way can a reliable distinction be made between normal and abnormal or induced develop ment. Each ontogenetic study essentially consists of a comparison of different deve lopmental stages. In most reports dealing with the development of individual organs or their subunits the material used is classified according to the estimated age or the length of the embryos. These criteria, however, are not valid, since considerable varia tion in developmental stage occurs between animals of the same age even between littermates and between animals of the same length. Therefore a method is needed for assigning embryos to successive developmental stages that are defmed on the basis of extemal and internal characteristics. This type of classification was elaborated by Stree ter (1942, 1945, 1948,1951), who arranged human embryos into developmental hori zons numbered XI through XXIII.

Author: Rudolf A. Raff
Publisher: University of Chicago Press
ISBN: 022625657X
Category : Science
Languages : en
Pages : 545

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Rudolf Raff is recognized as a pioneer in evolutionary developmental biology. In their 1983 book, Embryos, Genes, and Evolution, Raff and co-author Thomas Kaufman proposed a synthesis of developmental and evolutionary biology. In The Shape of Life, Raff analyzes the rise of this new experimental discipline and lays out new research questions, hypotheses, and approaches to guide its development. Raff uses the evolution of animal body plans to exemplify the interplay between developmental mechanisms and evolutionary patterns. Animal body plans emerged half a billion years ago. Evolution within these body plans during this span of time has resulted in the tremendous diversity of living animal forms. Raff argues for an integrated approach to the study of the intertwined roles of development and evolution involving phylogenetic, comparative, and functional biology. This new synthesis will interest not only scientists working in these areas, but also paleontologists, zoologists, morphologists, molecular biologists, and geneticists.

Author: Lynn K. Nyhart
Publisher: University of Chicago Press
ISBN: 9780226610863
Category : Science
Languages : en
Pages : 446

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List of IllustrationsAcknowledgmentsAbbreviations1: Situating MorphologyPt. 1: Morphology and Physiology2: The Study of Form before 18503: Rearranging the Sciences of Animal Life, 1845-1870Pt. 2: Evolutionary Morphology, 1860-18804: Descent and the Laws of Development5: Evolutionary Morphology at Jena6: Evolution and Morphology among the Zoologists, 1860-18807: Evolutionary Morphology in Anatomy: Carl Gegenbaur and His SchoolPt. 3: Morphology and Biology, 1880-19008: The Kompetenzkonflikt within the Evolutionary Morphological Program9: New Approaches to Form, 1880-1900: Rhetoric, Research, and Rewards10: Morphology, Biology, and the Zoological Professoriate11: Morphology and Disciplinary Development: Observations and ReflectionsApp. 1. Anatomy and Zoology Professors, 1810-1918, by BirthdateApp. 2. Professorships in Zoology, 1810-1918App. 3. Professorships in Anatomy, 1810-1918Archival SourcesBibliographyIndex Copyright © Libri GmbH. All rights reserved.

Author: Ken McNamara
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 312

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Recent studies have shown that relative changes in the rates and timing of growth during ontogeny, known as heterochrony, play a significant role in evolution. In this study, biologists, palaeontologists and anthropologists present overviews of current activity in heterochrony in their disciplines.

Author: Ronan O'Rahilly
Publisher: Carnegie Institute (WA)
ISBN:
Category : Medical
Languages : en
Pages : 328

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