Download or read book The Early Development of Amphioxus written by Gordon Ewart Newell and published by . This book was released on 1941 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Early Development of Amphioxus Reprinted from The School Science Review etc written by Gordon Ewart Newell and published by . This book was released on 1941 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Amphioxus and Its Development written by Berthold Hatschek and published by . This book was released on 1893 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Early Development of Amphioxus Reprinted from The School Science Review No 85 October 1940 written by Gordon Ewart Newell and published by . This book was released on 1940 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vertebrate Cranial Placodes written by GERHARD. SCHLOSSER and published by CRC Press. This book was released on 2021-04-29 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the cranial sense organs of vertebrates arise from embryonic structures known as cranial placodes. Such placodes also give rise to sensory neurons that transmit information to the brain as well as to many neurosecretory cells. This book focuses on the development of sensory and neurosecretory cell types from cranial placodes by introducing the vertebrate head with its sense organs and neurosecretory organs and providing an overview of the various cranial placodes and their derivatives, including evidence of common embryonic primordia. Schlosser discusses how these primordia are established in the early embryo and how individual placodes develop. The latter chapters explain how various placodally derived sensory and neurosecretory cell types differentiate into discrete structures.

Download or read book Amphioxus and the Ancestry of the Vertebrates written by Arthur Willey and published by . This book was released on 1894 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Marine Model Organisms in Experimental Biology written by Agnes Boutet and published by CRC Press. This book was released on 2021-12-13 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of molecular approaches for comparative biology and the rapid development of new molecular tools is unprecedented. The extraordinary molecular progress belies the need for understanding the development and basic biology of whole organisms. Vigorous international efforts to train the next-generation of experimental biologists must combine both levels – next generation molecular approaches and traditional organismal biology. This book provides cutting-edge chapters regarding the growing list of marine model organisms. Access to and practical advice on these model organisms have become a conditio sine qua non for a modern education of advanced undergraduate students, graduate students and postdocs working on marine model systems. Model organisms are not only tools they are also bridges between fields – from behavior, development and physiology to functional genomics. Key Features Offers deep insights into cutting-edge model system science Provides in-depth overviews of all prominent marine model organisms Illustrates challenging experimental approaches to model system research Serves as a reference book also for next-generation functional genomics applications Fills an urgent need for students Related Titles Jarret, R. L. & K. McCluskey, eds. The Biological Resources of Model Organisms (ISBN 978-1-1382-9461-5) Kim, S.-K. Healthcare Using Marine Organisms (ISBN 978-1-1382-9538-4) Mudher, A. & T. Newman, eds. Drosophila: A Toolbox for the Study of Neurodegenerative Disease (ISBN 978-0-4154-1185-1) Green, S. L. The Laboratory Xenopus sp. (ISBN 978-1-4200-9109-0)

Download or read book Amphioxus Immunity written by An-Long Xu and published by Elsevier. This book was released on 2015-12-31 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphioxus Immunity: Tracing the Origin of Human Immunity covers a remarkable range of information about Amphioxus and its evolutionary context. This compilation of what is currently known about Amphioxus, with a sharp focus on its immune system, includes 13 topics, such as: - Amphioxus as a model for understanding the evolution of vertebrates - basic knowledge of immunology - immune organs and cells of amphioxus - a genomic and transcriptomic view of the Amphioxus immunity - pattern recognition system in Amphioxus - transcription factors in Amphioxus - the complement system of Amphioxus - the oxidative burst system in Amphioxus - immune effectors in Amphioxus - lipid signaling of immune response in Amphioxus - apoptosis in amphioxus; primitive adaptive immune system of Amphioxus - and future research directions This valuable reference book is loaded with information that will be useful for anyone who wishes to learn more about the origin of vertebrates and adaptive immunity. - Provides new evidence on the origin of the adaptive immune system, the evolution of innate immunity, and evolution-stage specific immune defense mechanisms - Not only presents the cells and molecules involved in the adaptive immune response in Amphioxus, but also characterizes the origination and evolution of the gene families and pathways involved in innate immunity - Includes much pioneering work, from the molecular, genomic, and cellular to the individual level

Download or read book Chordate Origins and Evolution written by Noriyuki Satoh and published by Academic Press. This book was released on 2016-07-14 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chordate Origins and Evolution: The Molecular Evolutionary Road to Vertebrates focuses on echinoderms (starfish, sea urchins, and others), hemichordates (acorn worms, etc.), cephalochordates (lancelets), urochordates or tunicates (ascidians, larvaceans and others), and vertebrates. In general, evolution of these groups is discussed independently, on a larger scale: ambulacrarians (echi+hemi) and chordates (cephlo+uro+vert). Until now, discussion of these topics has been somewhat fragmented, and this work provides a unified presentation of the essential information. In the more than 150 years since Charles Darwin proposed the concept of the origin of species by means of natural selection, which has profoundly affected all fields of biology and medicine, the evolution of animals (metazoans) has been studied, discussed, and debated extensively. Following many decades of classical comparative morphology and embryology, the 1980s marked a turning point in studies of animal evolution, when molecular biological approaches, including molecular phylogeny (MP), molecular evolutionary developmental biology (evo-devo), and comparative genomics (CG), began to be employed. There are at least five key events in metazoan evolution, which include the origins of 1) diploblastic animals, such as cnidarians; 2) triploblastic animals or bilaterians; 3) protostomes and deuterostomes; 4) chordates, among deuterostomes; and 5) vertebrates, among chordates. The last two have received special attention in relation to evolution of human beings. During the past two decades, great advances have been made in this field, especially in regard to molecular and developmental mechanisms involved in the evolution of chordates. For example, the interpretation of phylogenetic relationships among deuterostomes has drastically changed. In addition, we have now obtained a large quantity of MP, evo-devo, and CG information on the origin and evolution of chordates. - Covers the most significant advances in this field to give readers an understanding of the interesting biological issues involved - Provides a unified presentation of essential information regarding each phylum and an integrative understanding of molecular mechanisms involved in the origin and evolution of chordates - Discusses the evolutionary scenario of chordates based on two major characteristic features of animals—namely modes of feeding (energy sources) and reproduction—as the two main forces driving animal evolution and benefiting dialogue for future studies of animal evolution

Download or read book Evolution and Development of Fishes written by Zerina Johanson and published by Cambridge University Press. This book was released on 2019-01-10 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: World-class palaeontologists and biologists summarise the state-of-the-art on fish evolution and development.

Download or read book The Amphioxus and Its Development written by Hatschek Berthold and published by Legare Street Press. This book was released on 2022-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Towards a New Neuromorphology written by Rudolf Nieuwenhuys and published by Springer. This book was released on 2015-12-28 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates that the systematic study of gene expression patterns in embryonic and adult brains, in combination with selected data from earlier studies, can pave the way for a new neuromorphology, the most salient features of which may be summarized as follows: (1) Causal analysis of molecular patterning at neural plate and early neural tube stages has shown that the CNS is essentially organized into transverse neural segments or neuromeres and longitudinal zones which follow the curved axis of the brain. (2) The FMUs initially represent thin neuroepithelial fields; in the course of further development they are transformed into three-dimensional radial units, extending from the ventricular surface to the meningeal surface of the brain. (3) The principal histogenetic processes, including cellular proliferation, cell migration and differentiation, essentially take place within the confines of these radial units, controlled by characteristic sets of developmental regulatory genes. (4) Although most developing neurons migrate radially and settle within their own FMU, at many locations neuroblasts leave the FMU where they were produced and migrate tangentially to other nearby or remote territories, colonizing parts of foreign FMUs. (5) Many structural complexes in the adult brain, including the cerebral and cerebellar cortices, are the products of radial and tangential intermingling of migrated cell contingents. (6) By using appropriate molecular markers, all neuron types in the adult CNS can be traced back to a specific progenitor zone within a specific FMU, and the progeny of any FMU can be traced to their final positions with the help of selective labeling approaches. (7) Early outgrowing axons form bundles, which tend to pass close to the border zones of the radial units. By means of their molecularly diversely tuned growth cones, these extending axons decide how to behave at each boundary they encounter, sometimes even reorienting at right angles. Collectively these early axonal bundles form a checkerboard-like scaffold, which accentuates the molecular regionalization of the CNS and leads to the formation of topographically ordered synaptic fields. The book covers all of these aspects in detail, providing a morphologic model (blueprint) that highlights the natural coordinates of CNS structure resulting from the conserved molecularly controlled shaping phenomena within morphogenetic fields.

Download or read book The development of isolated and partially separated blastomeres of amphioxus written by Edwin Grant Conklin and published by . This book was released on with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Amphioxus and Its Development Scholar s Choice Edition written by Hatschek Berthold and published by Scholar's Choice. This book was released on 2015-02-19 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Evolutionary Developmental Biology written by Laura Nuno de la Rosa and published by Springer. This book was released on 2020-11-15 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work provides an comprehensive and easily accessible source of information on numerous aspects of Evolutionary Developmental Biology. The work provides an extended overview on the current state of the art of this interdisciplinary and dynamic scientific field. The work is organized in thematic sections, referring to the specific requirements and interests in each section in far detail. “Evolutionary Developmental Biology – A Reference Guide” is intended to provide a resource of knowledge for researchers engaged in evolutionary biology, developmental biology, theoretical biology, philosophy of sciences and history of biology.

Download or read book Amphioxus and the Ancestry of the Vertebrates written by Arthur Willey and published by Theclassics.Us. This book was released on 2013-09 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ...in the details of its organisation, essentially resembles the embryos of the higher types. GENERAL CONSIDERATIONS. We will now pass on to give a general interpretation of some of the principal phenomena which are presented to us in the development of Amphioxus. Larval Asymmetry. By far the most prominent feature of the fully formed larva is its astounding asymmetry, and it is extremely important, from a morphological point of view, to form a just conception of it. The phenomenon of asymmetry manifests itself in the larva of Amphioxus under several very different aspects, and is occasioned by various causes. For convenience we may classify the forms of asymmetry which we have to consider under three main divisions, according to the type of organs involved. 1. Median Asymmetry.--This relates to such structures as lie normally in the middle line, whether dorsal or ventral, but which have been mechanically or correlatively displaced from their primitive position by the differential growth of neighbouring parts. Such are the olfactory pit and neuropore, the anus, the mouth, and the endostyle. All these are essentially and primordially median and unpaired structures. We have already dealt with the neuropore and anus, while the mouth and endostyle will be considered below. 2. Bilateral Asymmetry.--This refers to the alternation of paired structures, such as myotomes, spinal nerves, gillslits, and gonads, which we have already noted in the adult organisation. Primarily the organ of one side lies opposite to its antimere of the other side. By a secondary displacement it comes to alternate with it. 3. Unilateral Asymmetry.--Next to the asymmetrical mouth, this is perhaps the most striking form of asymmetry which the larva of Amphioxus exhibits. It...

Download or read book Across the Bridge written by Henry Gee and published by University of Chicago Press. This book was released on 2018-07-04 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Addresses an important topic for biologists and zoologists about vertebrates’ place in the ‘grand scheme’ . . . genuinely witty and charming . . . magnificent.” —Neil J. Gostling, University of Southampton Our understanding of vertebrate origins and the backbone of human history evolves with each new fossil find and DNA map. Many species have now had their genomes sequenced, and molecular techniques allow genetic inspection of even non-model organisms. But as longtime Nature editor Henry Gee argues in Across the Bridge, despite these giant strides and our deepening understanding of how vertebrates fit into the tree of life, the morphological chasm between vertebrates and invertebrates remains vast and enigmatic. As Gee shows, even as scientific advances have falsified a variety of theories linking these groups, the extant relatives of vertebrates are too few for effective genetic analysis. Moreover, the more we learn about the species that do remain—from sea-squirts to starfish—the clearer it becomes that they are too far evolved along their own courses to be of much use in reconstructing what the latest invertebrate ancestors of vertebrates looked like. Fossils present yet further problems of interpretation. Tracing both the fast-changing science that has helped illuminate the intricacies of vertebrate evolution as well as the limits of that science, Across the Bridge helps us to see how far the field has come in crossing the invertebrate-to-vertebrate divide—and how far we still have to go. “A beautiful ode to some of the least appreciated animals . . . guides the reader joyfully through deuterostomes—weaving disparate elements of embryology, paleontology, and morphology into an unprecedented and accessible narrative.” —Jakob Vinther, University of Bristol