Reproductive Strategies and Developmental Patterns in Annelids

Download Reproductive Strategies and Developmental Patterns in Annelids PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9401728879
Total Pages : 314 pages
Book Rating : 4.4/5 (17 download)

DOWNLOAD NOW!


Book Synopsis Reproductive Strategies and Developmental Patterns in Annelids by : Adriaan W.C. Dorresteijn

Download or read book Reproductive Strategies and Developmental Patterns in Annelids written by Adriaan W.C. Dorresteijn and published by Springer Science & Business Media. This book was released on 2013-04-18 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fascination of the Annelida to scientists lies in the beauty of their structures and the functionality of their body plan, the tremendous adaptive radiation which has made it possible for these animals to colonize almost all marine, limnic and terrestrial biotopes. In doing so they have evolved a great variety of life forms, and their reproduction and development are correspondingly diverse, with many modes and patterns unique in the animal kingdom. In this special volume recent progress in this broad research area is presented by 26 specialists, in general through surveys or treatments of selected examples. Some of them review important annelid taxa such as the Nereididae, Syllidae, Spionidae, Cirratulidae, Clitellata, and Pogonophora; others analyse reproductive and developmental structures and phenomena in annelids, e.g. segmental organs, sex pheromones, oogenesis, mating systems, sperm types, life cycles, larval settlement, cleavage and symmetry of embryos, or discuss controversial approaches to annelid systematics. The book will be of interest to all zoologists who work with annelids as well as to embryologists and other researchers in reproductive biology.

Annelids in Modern Biology

Download Annelids in Modern Biology PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470455195
Total Pages : 384 pages
Book Rating : 4.4/5 (74 download)

DOWNLOAD NOW!


Book Synopsis Annelids in Modern Biology by : Daniel H. Shain

Download or read book Annelids in Modern Biology written by Daniel H. Shain and published by John Wiley & Sons. This book was released on 2009-04-22 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annelids offer a diversity of experimentally accessible features making them a rich experimental subject across the biological sciences, including evolutionary development, neurosciences and stem cell research. This volume introduces the Annelids and their utility in evolutionary developmental biology, neurobiology, and environmental/ecological studies, including extreme environments. The book demonstrates the variety of fields in which Annelids are already proving to be a useful experimental system. Describing the utility of Annelids as a research model, this book is an invaluable resource for all researchers in the field.

Systematics and Diversity of Annelids

Download Systematics and Diversity of Annelids PDF Online Free

Author :
Publisher : MDPI
ISBN 13 : 3036513906
Total Pages : 520 pages
Book Rating : 4.0/5 (365 download)

DOWNLOAD NOW!


Book Synopsis Systematics and Diversity of Annelids by : Maria Capa

Download or read book Systematics and Diversity of Annelids written by Maria Capa and published by MDPI. This book was released on 2021-08-18 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Special Issue, we address the state of the art of the systematics of the main annelid groups and the improvements in the diversity they hold, with special emphasis on the latest discoveries in well-studied areas, expeditions to unsurveyed areas or environments, or the use of novel techniques that allow for the improvement of biodiversity knowledge. We are hoping that this Special Issue will provide a platform facilitating a review of current knowledge on the subject, identifying current research problems, as well as indicating directions and research trends for the future.

Handbook of Marine Model Organisms in Experimental Biology

Download Handbook of Marine Model Organisms in Experimental Biology PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1000464334
Total Pages : 964 pages
Book Rating : 4.0/5 (4 download)

DOWNLOAD NOW!


Book Synopsis Handbook of Marine Model Organisms in Experimental Biology by : Agnes Boutet

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)

Annelida

Download Annelida PDF Online Free

Author :
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110291584
Total Pages : 492 pages
Book Rating : 4.1/5 (12 download)

DOWNLOAD NOW!


Book Synopsis Annelida by : Günter Purschke

Download or read book Annelida written by Günter Purschke and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-03-18 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first in a series of 4 volumes in the Handbook of Zoology series about morphology, anatomy, reproduction, development, ecology, phylogeny and systematics of Annelida. This first volume covers members of the so-called basal radiation and the first part of Sedentaria. It is supplemented by chapters on the history of annelid research, their fossil record, and an introduction to the phylogeny of annelids and their position in the tree of life. In the latter chapter the history of their systematic is reviewed giving an almost complete picture of systematic-scientific progress especially in the past years which changed our view on annelid phylogeny dramatically. The most basal annelids, lately united as Palaeoannelida, represent two families of aberrant polychaetes formerly often suggested to be highly derived which now give us a fresh look on how the ancestral annelid may have looked like. These lack certain key characters such as nuchal organs and possess rather simple nervous systems which now likely represent primitive character states. In this basal radiation the first taxon of apparently unsegmented and achaetigerous animals is positioned, the Sipuncula. Most likely another group of platyhelminth-like and unsegmented and even chaeta-lees annelids, Lobatocerebridae falls into this basal radiation. The section of Sedentaria starts with Orbiniida, a taxon characterized by elongated, thread-like worms which do not have anterior appendages like palps and comprises several families representing members of the Meiofauna. These minute worms often inhabiting the interstitial spaces in marine sands are suggested to have evolved by progenesis. The second higher taxon is represented by Cirratuliformia comprising nine families of typical sedentary polychaetes each of which showing a remarkable variation of the annelid body plan. Members of this taxon usually exhibit many annelid characters but certain also lack the most typical prostomial appendages, the palps.

Annelida

Download Annelida PDF Online Free

Author :
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110291681
Total Pages : 474 pages
Book Rating : 4.1/5 (12 download)

DOWNLOAD NOW!


Book Synopsis Annelida by : Günter Purschke

Download or read book Annelida written by Günter Purschke and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-02-24 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second volume in a series of 4 volumes in the Handbook of Zoology series treating morphology, anatomy, reproduction, development, ecology, phylogeny, systematics and taxonomy of polychaetous Annelida. In this volume a comprehensive review of a few more derived higher taxa within Sedentaria are given, namely Sabellida, Opheliida/Capitellida as well as Hrabeiellidae. The former comprise annelids possessing a body divided into two more or less distinct regions or tagmata called thorax and abdomen. Here two groups of families are united, the spioniform and sabelliform polychaetes. Especially Spionidae and Sabellidae are speciose families within this group and represent two of the largest annelid families. These animals live in various types of burrows or tubes and all possess so-called feeding palps. In one group these appendages are differentiated as grooved feeding palps, whereas in the other they may form highly elaborated circular tentacular crowns comprising a number of radioles mostly giving off numerous filamentous pinnulae. Often additionally colourful, the latter are also received the common names "feather-duster worms", "flowers of the sea", "Christmas-tree worms". Opheliida/Capitellida including five families of truly worm-like annelids without appendages represents the contrary. Their members burrow in soft bottom substrates and may be classified as non-selective deposit feeders. Molecular phylogenetic analyses have shown that Echiura or spoon worms, formerly regarded to represent a separate phylum, are members of this group. Last not least Hrabeiellidae is one out of only two families of oligochaete-like terrestrial polychaetes and for this reason received strong scientific interest.

Marine Ornamental Species Aquaculture

Download Marine Ornamental Species Aquaculture PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470673907
Total Pages : 749 pages
Book Rating : 4.4/5 (76 download)

DOWNLOAD NOW!


Book Synopsis Marine Ornamental Species Aquaculture by : Ricardo Calado

Download or read book Marine Ornamental Species Aquaculture written by Ricardo Calado and published by John Wiley & Sons. This book was released on 2017-03-06 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global trade of aquatic organisms for home and public aquariums, along with associated equipment and accessories, has become a multi-billion dollar industry. Aquaculture of marine ornamental species, still in its infancy, is recognized as a viable alternative to wild collection as it can supplement or replace the supply of wild caught specimens and potentially help recover natural populations through restocking. This book collects into a single work the most up-to-date information currently available on the aquaculture of marine ornamental species. It includes the contributions of more than 50 leading scientists and experts on different topics relevant for the aquaculture of the most emblematic groups of organisms traded for reef aquariums. From clownfish, to angelfish, tangs and seahorses, as well as corals, anemones, shrimps, giant clams and several other reef organisms, all issues related with the husbandry, breeding, and trade are addressed, with explanatory schemes and illustrations being used to help in understanding the most complex topics addressed. Marine Ornamental Species Aquaculture is a key reference for scientists and academics in research institutes and universities, public and private aquaria, as well as for hobbyists. Entrepreneurs will also find this book an important resource, as the culture of marine ornamental species is analyzed from a business oriented perspective, highlighting the risks and opportunities of commercial scale aquaculture of marine ornamentals.

Emerging Model Systems in Developmental Biology

Download Emerging Model Systems in Developmental Biology PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0128201606
Total Pages : 728 pages
Book Rating : 4.1/5 (282 download)

DOWNLOAD NOW!


Book Synopsis Emerging Model Systems in Developmental Biology by :

Download or read book Emerging Model Systems in Developmental Biology written by and published by Academic Press. This book was released on 2022-03-23 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ever-growing roster of model organisms is a hallmark of 21st century Developmental Biology. Emerging model organisms are well suited to asking some fascinating and important questions that cannot be addressed using established model systems. And new methods are increasingly facilitating the adoption of new research organisms in laboratories. This volume is written by some of the scientists who have played pivotal roles in developing new models or in significantly advancing tools in emerging systems. Presents some of the most interesting additions to the core set of model organisms Contains contributions from people who have developed new model systems or advanced tools Includes personal stories about how and why model systems were developed

Reproductive Biology and Phylogeny of Annelida

Download Reproductive Biology and Phylogeny of Annelida PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1482280159
Total Pages : 698 pages
Book Rating : 4.4/5 (822 download)

DOWNLOAD NOW!


Book Synopsis Reproductive Biology and Phylogeny of Annelida by : Barrie G M Jamieson

Download or read book Reproductive Biology and Phylogeny of Annelida written by Barrie G M Jamieson and published by CRC Press. This book was released on 2006-01-03 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annelida is a diverse group of animals, commonly referred to as segmented worms and currently comprising around 14000 described species. Found in most marine and freshwater areas, annelids have also successfully occupied many subterranean habitats. This volume documents annelid reproduction in the context of their phylogenetic relationships. It pre

Morphology, Molecules, Evolution and Phylogeny in Polychaeta and Related Taxa

Download Morphology, Molecules, Evolution and Phylogeny in Polychaeta and Related Taxa PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 1402032404
Total Pages : 391 pages
Book Rating : 4.4/5 (2 download)

DOWNLOAD NOW!


Book Synopsis Morphology, Molecules, Evolution and Phylogeny in Polychaeta and Related Taxa by : Universität Osnabrück

Download or read book Morphology, Molecules, Evolution and Phylogeny in Polychaeta and Related Taxa written by Universität Osnabrück and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, evidence has been accumulated which shows that some of the groups formerly regarded as independent "phyla" such as Pogonophora (now recognized as Siboglinidae), Echiura, Myzostomida and perhaps Sipuncula, are most probably nothing else than greatly modified Annelida. The extreme morphological diversity found especially in Polychaeta displays the plasticity of a simple segmented organisation that basically is nothing else but a serial repetition of identical units. Thus, annelids are highly important to our understanding of fundamental questions about morphological and adaptive diversity, as well as clarifying evolutionary changes and phylogenetic relationships. The book aims to summarize our knowledge on Polychaetes polychaetes and their allies and gives an overview of recent advances gained by studies that employed conventional and modern methods plus, increasingly and importantly, the use of molecular markers and computer-assisted kinship analyses. It also reflects the state of art in polychaete sciences and presents new questions and controversies. As such it will significantly influence the direction of research on Polychaeta and their related taxa.

Cellular Processes in Segmentation

Download Cellular Processes in Segmentation PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 0429752490
Total Pages : 236 pages
Book Rating : 4.4/5 (297 download)

DOWNLOAD NOW!


Book Synopsis Cellular Processes in Segmentation by : Ariel Chipman

Download or read book Cellular Processes in Segmentation written by Ariel Chipman and published by CRC Press. This book was released on 2020-04-03 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of segmentation is one of the central questions in evolutionary developmental biology. Indeed, it is one of the best case studies for the role of changes in development in the evolution of body plans. Segmented body plans are believed to have appeared several times in animal evolution, and to have contributed significantly to the evolutionary success of the taxa in which they are present. Because of the centrality of the subject, and the continuing interest in understanding segmentation, this book offers an often overlooked focus on the cellular aspects of the process of segmentation, providing an invaluable reference for students of evolutionary developmental biology at all levels. Key Features Explores the role that segmentation has played in the diversity of animals Documents the diverse cellular mechanisms by which segmentation develops Reviews the independent evolutionary origins of segmentation Provides insight into the general patterns of serial homology at the cellular level Related Titles Lynne Bianchi. Developmental Neurobiology (ISBN 978-0-8153-4482-7). Jonathan Bard. Principles of Evolution: Systems, Species, and the History of Life (ISBN 978-0-8153-4539-8). Gerhard Scholtz. Evolutionary Developmental Biology of Crustacea (ISBN 978-9-0580-9637-1). Dr. Ariel D. Chipman is Associate Professor in the Department of Ecology, Evolution & Behavior of the Silberman Institute of Life Sciences at The Hebrew University of Jerusalem. He is the author or co-author of dozens of peer reviewed scientific journal articles. His research focuses upon the evolution of animal body plans with a focus on arthropod segmentation, integrating comparative embryology, the fossil record and genome evolution.

Psammonalia

Download Psammonalia PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (318 download)

DOWNLOAD NOW!


Book Synopsis Psammonalia by :

Download or read book Psammonalia written by and published by . This book was released on 1999 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Reproduction and Development in Annelida

Download Reproduction and Development in Annelida PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 0429582587
Total Pages : 508 pages
Book Rating : 4.4/5 (295 download)

DOWNLOAD NOW!


Book Synopsis Reproduction and Development in Annelida by : T. J. Pandian

Download or read book Reproduction and Development in Annelida written by T. J. Pandian and published by CRC Press. This book was released on 2019-01-30 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a concise informative elucidation of all aspects of reproduction and development in annelids covering from arenicola to tubifex. Annelids flourish between 4,900 m depth to 2,000 m altitude; some of them occur in unusual habitats like hydrothermal vents and subterranean aquatic system (stigobionts). A few have no gut and acquire adequate nutrients through osmotrophism and/or engaging symbiotic microbes. In the absence of exoskeleton to escape predation, the 17,000 speciose annelids have explored bewildering modes of reproduction; not surprisingly, 42–47% of them are brooders. With 13,000 species, polychaetes are gonochores but some 207 species of them are hermaphrodites. Clitellates are all hermaphrodites; of them, 76 species are parthenogens, of which 56 are earthworms. Regenerative potency of annelids ranges from an organ to an entire worm from a single ‘seminal’ segment. The head, tail and both together can be regenerated 21, 42 and 20 times, respectively. However, the potency is limited to ~1% of polychaetes and Heterogamatic sex determination is reported to occur only in six polychaete species, although karyotype is known for 83 annelid species. In temperate polychaetes, a dozen neuroendocrines, arising mostly from the ‘brain’ regulates reproductive cycle. A complete chapter devoted to vermiculture, (i) recognizes the fast-growing candidate species, (ii) distinguishes 'layers' from 'brooders', (iii) indicates that the harvest of oligochaetes may reduce the input of nitrogenous fertilizer in the ricefield, and (iv) explores the scope for increasing wealth from waste.

Coastal Plankton

Download Coastal Plankton PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (318 download)

DOWNLOAD NOW!


Book Synopsis Coastal Plankton by : Otto Larink

Download or read book Coastal Plankton written by Otto Larink and published by . This book was released on 2006 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each glance into a marine plankton sample is a look into a fantastic world for anyone who wants to study protists and invertebrate animals. Nowhere is it possible to observe with a simple device such a variety of forms and taxa, developmental stages and adaptations as in a Petri dish with a small plankton sample placed under a light microscope. This book, with more than 600 micro- and 40 macrophotographs on 60 colour plates, is an introduction to the most important and most common taxa present in the plankton, and it allows the identification even of numerous common species. 117 micrographs demonstrate characteristic forms of the phytoplankton, 70 of protozoans, more than 300 show larvae and other developmental stages, and about 90 show holoplanktonic adults of the zooplankton. The comprehensively annotated pictures are taken from living organisms, during marine excursions, mainly from the North Sea coastal area but also from other European coastlines, including the western Mediterranean. The book, therefore, is excellently suited to be used in such university courses for students of zoology and marine biology as well as for their teachers, but it is certainly also a comprehensible guide for any amateur microscopist and interested layperson.

Reproductive and Developmental Strategies

Download Reproductive and Developmental Strategies PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 4431566090
Total Pages : 790 pages
Book Rating : 4.4/5 (315 download)

DOWNLOAD NOW!


Book Synopsis Reproductive and Developmental Strategies by : Kazuya Kobayashi

Download or read book Reproductive and Developmental Strategies written by Kazuya Kobayashi and published by Springer. This book was released on 2018-06-01 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides new insights into the universality of biological systems in animal reproduction and development by a comparative study of a variety of mechanisms in animals ranging from basal invertebrates to vertebrates, including mammals. Animals accomplish genetic diversity through meiosis and fertilization, and during embryogenesis animals must produce specialized cell types, including germ cells, in accordance with their individual body plan. This series of phenomena is essential to the continuity of life in the animal kingdom, and animals show various reproductive and developmental strategies. This volume, comprising four parts, reviews animal kingdom diversity, including reproductive strategies and germ cell differentiation mechanisms (Part 1), sex determination and differentiation (Part2), the mechanisms of fertilization (Part 3), and body axis formation (Part 4). Readers will find descriptions of the reproduction or development of 180 species, 13 phyla, 35 classes, 74 orders, 117 families, and 151 genera in this book. Of particular interest is the diversity of molecules and mechanisms used to achieve the same biological purpose in different animals. Undergraduates, graduate students, and professional scientists who want a deeper understanding of animal reproductive and developmental mechanisms will find this book to be of great value.

Concepts of Biology

Download Concepts of Biology PDF Online Free

Author :
Publisher :
ISBN 13 : 9789888407453
Total Pages : 618 pages
Book Rating : 4.4/5 (74 download)

DOWNLOAD NOW!


Book Synopsis Concepts of Biology by : Samantha Fowler

Download or read book Concepts of Biology written by Samantha Fowler and published by . This book was released on 2018-01-07 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.

Regenerative Biology and Medicine

Download Regenerative Biology and Medicine PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 012384861X
Total Pages : 474 pages
Book Rating : 4.1/5 (238 download)

DOWNLOAD NOW!


Book Synopsis Regenerative Biology and Medicine by : David L. Stocum

Download or read book Regenerative Biology and Medicine written by David L. Stocum and published by Academic Press. This book was released on 2012-06-07 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regenerative Biology and Medicine, Second Edition — Winner of a 2013 Highly Commended BMA Medical Book Award for Medicine — discusses the fundamentals of regenerative biology and medicine. It provides a comprehensive overview, which integrates old and new data into an ever-clearer global picture. The book is organized into three parts. Part I discusses the mechanisms and the basic biology of regeneration, while Part II deals with the strategies of regenerative medicine developed for restoring tissue, organ, and appendage structures. Part III reflects on the achievements of regenerative biology and medicine; future challenges; bioethical issues that need to be addressed; and the most promising developments in regenerative medicine. The book is designed for multiple audiences: undergraduate students, graduate students, medical students and postdoctoral fellows, and research investigators interested in an overall synthesis of this field. It will also appeal to investigators from fields not directly related to regenerative biology and medicine, such as chemistry, informatics, computer science, mathematics, physics, and engineering. Highly Commended 2013 BMA Medical Book Award for Medicine Includes coverage of skin, hair, teeth, cornea, and central neural tissues Provides description of regenetive medicine in digestive, respiratory, urogenital, musculoskeletal, and cardiovascular systems Includes amphibians as powerful research models with discussion of appendage regeneration in amphibians and mammals