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It explains how hydras replace worn-out cells and entire body parts through turnover and regeneration, and how experiments may offer insight into cellular mechanisms related to cancer. The text also outlines laboratory investigation methods, includes photomicrographs by Dr. Jane A. Westfall, and provides an organized guide through chapters covering appearance, movement, life cycle, and microscopic study.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":15,"@type":76,"position":81},"https://docshare.wps.com/document/literature/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/hydra-photomicrographs-and-biology-foreword-1977/568656/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/hydra-photomicrographs-and-biology-foreword-1977/568656.png","ImageObject",300,407,{"name":92,"@type":93},"Eliana","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-13",true,{"@type":101,"interactionType":102,"userInteractionCount":4},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"What makes hydras scientifically remarkable?","Question",{"text":111,"@type":112},"Hydras can rapidly replace worn-out cells and whole body parts through turnover and regeneration. This has led scientists since the 18th century to study their unusual capabilities.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"How do hydras learn to respond to stimuli?",{"text":116,"@type":112},"Hydras use a simple nerve system to learn responses to stimuli and regulate their behavior. Observing them reflects some human life processes.",{"name":118,"@type":109,"acceptedAnswer":119},"What does the book cover about hydras and cancer?",{"text":120,"@type":112},"The book points out the importance of hydras for research on regeneration, aging, and cancer. It also describes how experiments with hydra may provide insight into cellular mechanisms that cause cancer in humans.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},568656,1791871830,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":14,"category_name":15,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":128,"read_time":143},4398048949847,"https://ap-avatar.wpscdn.com/avatar/400002536579ef2da7f?_k=1778318612642679267","HdraDr.StanleyShostakPhotomicrographs by Dr.Jane A.Westfall  \nHydraDr.Stanley Shostak  \nPhotomicrographs by Dr.Jane A.Westfall  \nHydras are easily found in freshwater ponds,lakes and streams.These tiny animals are barelyvisible to the naked eye.They look like shortpieces of frayed string and float just below thesurface of the water or attach themselves tosubmerged rocks,deadwood or pond grass.  \nHydras are truly remarkable animals.Sincethe 18th century,scientists have been studyingtheir unusual capabilities.Hydras can rapidlyreplace both wornout cells and whole body partsby two processes called turnover and regenera-tion.Theoretically,a hydra could live forever!  \nStanley Shostak lucidly describes the char-acteristics of these fascinating animals andpoints out their importance for research onregeneration,aging and cancer.Instructions forinvestigating hydras in a laboratory the readercan set up at home are included.Jane Westfall'smagnificent photomicrographs show hydra instartling detail.  \n9up  \n$5.96  \nThis is a Coward,McCann&GeogheganGuaranteed Binding  \n7-39  \n# HENRY WALDINGER vEMORIAL LIBRARY\n\nDigitized by the Internet Archivein 2022 with funding fromKahle/Austin Foundation  \nhttps://archive.org/details/hydra0000unse_z4s4  \nHydras are common in freshwater habitats such as ponds,lakesand streams.They are approximately one hundred times smallerin length than a mature human and at least ten thousand timeslarger than a bacterium,one of the smallest forms of life.Theirclosest relatives are the jellyfish,sea anemones and corals thatlive in the ocean,but they also have interesting life propertiessimilar to those of humans.In fact,experiments with hydra mayyield insight into the cellular mechanisms that cause cancer inhumans.  \nAs with many forms of life,hydras capture food to gain nour-ishment.They reproduce,and move about when disturbed.Through a simple nerve system hydras learn to respond to stim-uli and to regulate their behavior.Hence,as we study hydras,we see some of our own life processes reflected in them,and wecan see ourselves more clearly as part of the remarkable spec-trum of life on our planet.Still,hydras are very different fromhumans,and this contributes to their novelty.For example,theyhave an indefinite life span,as though they were immortal.  \nOne of the enduring sources of adventure in biology is learn-ing about the diverse habits of various forms of life.Such an ad-venture awaits you with the\"frayed string animals\"calledhydra.  \n—O.Roger Anderson  \nTeachers College,Columbia Universityand Senior Research Associate,Biological Oceanography,Lamont-Doherty Geological Observatory  \nHydra  \nDr.Stanley ShostakPhotomicrographs by Dr.Jane A.Westfall  \nCoward,McCann&Geoghegan,Inc.New York  \n659316  \n4593.71  \nSeries EditorDr.Frances L.Behnke  \nCopyright @1977 by the University of Pittsburgh  \nAll rights reserved.This book,or parts thereof,may not be reproduced in any form without permissionin writing from the publishers.Published simultaneouslyin Canada by Longman Canada Limited,Toronto.  \nLibrary of Congress Cataloging in Publication Data  \nShostak,Stanley  \nThe hydra.  \nBibliography.  \nIncludes index.  \nSUMMARY:A description of the life cycle and variousbiological abilities of the hydra.  \n1.Hydra—Juvenile literature.[1.Hydra]QL377.H9S54593'.7177、9875  \nISBN 0-698-30671-6  \nPRINTED IN THE UNITED STATES OF AMERICA  \nForeword  \nOneThe Frayed String Animals7TwoWhat Hydras Look Like12ThreeHydras'Remarkable Capabilities14FourTaking Hydras Apart and PuttingThem Back Together Again18FiveWhere and How Hydras Live20SixMovement23SevenHow New Hydras Are Made24EightLooking at a Hydra's CellsUnder the Microscope29NineHydras and Cancer37Hydras on Your Own39Glossary42Further Reading45Index46","cbCaipyoXlPSQfWy","https://ap.wps.com/l/cbCaipyoXlPSQfWy","pdf",3632107,56,"English","# Foreword\n# One - The Frayed String Animals\n# Two - What Hydras Look Like\n# Three - Hydras' Remarkable Capabilities\n# Four - Taking Hydras Apart and Putting Them Back Together Again\n# Five - Where and How Hydras Live\n# Six - Movement\n# Seven - How New Hydras Are Made\n# Eight - Looking at a Hydra's Cells Under the Microscope\n# Nine - Hydras and Cancer\n# Hydras on Your Own\n# Glossary\n# Further Reading\n# Index","[{\"question\":\"What makes hydras scientifically remarkable?\",\"answer\":\"Hydras can rapidly replace worn-out cells and whole body parts through turnover and regeneration. This has led scientists since the 18th century to study their unusual capabilities.\"},{\"question\":\"How do hydras learn to respond to stimuli?\",\"answer\":\"Hydras use a simple nerve system to learn responses to stimuli and regulate their behavior. Observing them reflects some human life processes.\"},{\"question\":\"What does the book cover about hydras and cancer?\",\"answer\":\"The book points out the importance of hydras for research on regeneration, aging, and cancer. It also describes how experiments with hydra may provide insight into cellular mechanisms that cause cancer in humans.\"}]","Hydra - Photomicrographs and Biology - Foreword - 1977 | PDF",86]