Notochord development evolution contributions par witten eckhard (13 résultats)

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Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Although it is the defining organ of Chordates, the notochord is perhaps the least understood of vertebrate organs because it is usually considered a transient structure only present in early embryonic development.…

Buch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Although it is the defining organ of the Chordata, the notochord and its cells are one of the least understood vertebrate organs. This may be because large parts of the notochord are often replaced with cartilaginous or bony vertebral bodies. The presence of cartilage in the notochord raises questions about the evolutionary relationships between notochord cells and cartilage cells. This book integrates classical analytical studies with recent palaeontological, experimental, and molecular studies in both developmental and evolutionary contexts. For example, although the early signaling function of the notochord is conserved across the vertebrates, many will be surprised to find that the role of the notochord in vertebral body development in tetrapods is not the blueprint for all vertebrates. Recent studies on zebrafish and medaka embryos have uncovered the molecular mechanisms of a somite-independent notochord-driven segmentation process that establishes vertebral centra and intervertebral spaces. As this process is not restricted to teleosts, the authors have written a general discussion about the role of the notochord in vertebral formation. Modularity and segmentation of the vertebral column are related topics. Further overarching themes are the structure, function and fate of the notochord in adult vertebrates and notochord-cartilage relationships.Key FeaturesThe first book devoted to notochord development, function and evolution Includes and integrates information on the notochord from studies going back 169 yearsIntegrates developmental, molecular, functional, experimental and palaeontological studiesDocuments the fate of the notochord across the vertebratesExtensively illustrated with classical and new imagesRelated TitlesBard, J. Evolution: The Origins and Mechanisms of Diversity (ISNB 978-0-3673-5701-6)Leys, S. and Hejnol. A. Origin and Evolution of Metazoan Cell Types (ISBN 978-1-1380-3269-9)¿¿¿¿¿.…