{"id":"https://openalex.org/W2112492425","doi":"https://doi.org/10.1002/aja.1001380207","title":"A reexamination of the chorioallantoic placental membrane of a shrew, Blarina brevicauda: Resolution of a controversy","display_name":"A reexamination of the chorioallantoic placental membrane of a shrew, Blarina brevicauda: Resolution of a controversy","publication_year":1973,"publication_date":"1973-10-01","ids":{"openalex":"https://openalex.org/W2112492425","doi":"https://doi.org/10.1002/aja.1001380207","mag":"2112492425","pmid":"https://pubmed.ncbi.nlm.nih.gov/4747737"},"language":"en","primary_location":{"id":"doi:10.1002/aja.1001380207","doi":"https://doi.org/10.1002/aja.1001380207","is_oa":false,"landing_page_url":"https://doi.org/10.1002/aja.1001380207","pdf_url":null,"source":{"id":"https://openalex.org/S69635808","display_name":"American Journal of Anatomy","issn_l":"0002-9106","issn":["0002-9106","1553-0795"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Anatomy","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5025148562","display_name":"William A. Wimsatt","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I205783295","display_name":"Cornell University","ror":"https://ror.org/05bnh6r87","country_code":"US","type":"education","lineage":["https://openalex.org/I205783295"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"William A. Wimsatt","raw_affiliation_strings":["Division of Biological Sciences, Cornell University, Ithaca, New York"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Biological Sciences, Cornell University, Ithaca, New York","institution_ids":["https://openalex.org/I205783295"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105235109","display_name":"Allen C. Enders","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I204465549","display_name":"Washington University in St. Louis","ror":"https://ror.org/01yc7t268","country_code":"US","type":"education","lineage":["https://openalex.org/I204465549"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Allen C. Enders","raw_affiliation_strings":["Department of Anatomy, Washington University School of Medicine, St. Louis, Missouri"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Anatomy, Washington University School of Medicine, St. Louis, Missouri","institution_ids":["https://openalex.org/I204465549"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5000479713","display_name":"Harland W. Mossman","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I135310074","display_name":"University of Wisconsin\u2013Madison","ror":"https://ror.org/01y2jtd41","country_code":"US","type":"education","lineage":["https://openalex.org/I135310074"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Harland W. Mossman","raw_affiliation_strings":["Department of Anatomy, University of Wisconsin, Madison, Wisconsin"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Anatomy, University of Wisconsin, Madison, Wisconsin","institution_ids":["https://openalex.org/I135310074"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":1.1446,"has_fulltext":false,"cited_by_count":29,"citation_normalized_percentile":{"value":0.81256851,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":96},"biblio":{"volume":"138","issue":"2","first_page":"207","last_page":"233"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10290","display_name":"Pregnancy and preeclampsia studies","score":0.5317000150680542,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10290","display_name":"Pregnancy and preeclampsia studies","score":0.5317000150680542,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11510","display_name":"Reproductive System and Pregnancy","score":0.36039999127388,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T13100","display_name":"Comparative Animal Anatomy Studies","score":0.08070000261068344,"subfield":{"id":"https://openalex.org/subfields/2702","display_name":"Anatomy"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/blarina-brevicauda","display_name":"Blarina brevicauda","score":0.8939999938011169},{"id":"https://openalex.org/keywords/chorioallantoic-placenta","display_name":"chorioallantoic placenta","score":0.8899999856948853},{"id":"https://openalex.org/keywords/endotheliochorial-placenta","display_name":"endotheliochorial placenta","score":0.9679999947547913},{"id":"https://openalex.org/keywords/syncytiotrophoblast","display_name":"syncytiotrophoblast","score":0.9229999780654907},{"id":"https://openalex.org/keywords/mesenchymal-cells","display_name":"mesenchymal cells","score":0.824999988079071},{"id":"https://openalex.org/keywords/maternal-fetal-exchange","display_name":"maternal-fetal exchange","score":0.49000000953674316}],"concepts":[{"id":"https://openalex.org/C2777495146","wikidata":"https://www.wikidata.org/wiki/Q1889778","display_name":"Trophoblast","level":5,"score":0.7960858345031738},{"id":"https://openalex.org/C2779333224","wikidata":"https://www.wikidata.org/wiki/Q809756","display_name":"Basal lamina","level":3,"score":0.7684438228607178},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.6450684070587158},{"id":"https://openalex.org/C2776992346","wikidata":"https://www.wikidata.org/wiki/Q111140","display_name":"Endothelium","level":2,"score":0.6102112531661987},{"id":"https://openalex.org/C95444343","wikidata":"https://www.wikidata.org/wiki/Q7141","display_name":"Cell biology","level":1,"score":0.5789968967437744},{"id":"https://openalex.org/C158617107","wikidata":"https://www.wikidata.org/wiki/Q79927","display_name":"Endoplasmic reticulum","level":2,"score":0.5561432242393494},{"id":"https://openalex.org/C2776953305","wikidata":"https://www.wikidata.org/wiki/Q1212935","display_name":"Placenta","level":4,"score":0.47394895553588867},{"id":"https://openalex.org/C45167389","wikidata":"https://www.wikidata.org/wiki/Q1114520","display_name":"Placentation","level":5,"score":0.4342464506626129},{"id":"https://openalex.org/C2779315647","wikidata":"https://www.wikidata.org/wiki/Q2745412","display_name":"Syncytiotrophoblast","level":5,"score":0.4340946078300476},{"id":"https://openalex.org/C2780197806","wikidata":"https://www.wikidata.org/wiki/Q2531387","display_name":"Decidua","level":5,"score":0.4122408330440521},{"id":"https://openalex.org/C105702510","wikidata":"https://www.wikidata.org/wiki/Q514","display_name":"Anatomy","level":1,"score":0.3623262345790863},{"id":"https://openalex.org/C87555872","wikidata":"https://www.wikidata.org/wiki/Q3141316","display_name":"Ultrastructure","level":2,"score":0.35944604873657227},{"id":"https://openalex.org/C172680121","wikidata":"https://www.wikidata.org/wiki/Q26513","display_name":"Fetus","level":3,"score":0.24794423580169678},{"id":"https://openalex.org/C134018914","wikidata":"https://www.wikidata.org/wiki/Q162606","display_name":"Endocrinology","level":1,"score":0.20067408680915833},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.08848291635513306},{"id":"https://openalex.org/C2779234561","wikidata":"https://www.wikidata.org/wiki/Q11995","display_name":"Pregnancy","level":2,"score":0.0}],"mesh":[{"descriptor_ui":"D000818","descriptor_name":"Animals","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D002462","descriptor_name":"Cell Membrane","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D003594","descriptor_name":"Cytoplasmic Granules","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D004727","descriptor_name":"Endothelium","qualifier_ui":"Q000166","qualifier_name":"cytology","is_major_topic":false},{"descriptor_ui":"D005110","descriptor_name":"Extracellular Space","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005321","descriptor_name":"Extraembryonic Membranes","qualifier_ui":"Q000098","qualifier_name":"blood supply","is_major_topic":false},{"descriptor_ui":"D005321","descriptor_name":"Extraembryonic Membranes","qualifier_ui":"Q000166","qualifier_name":"cytology","is_major_topic":true},{"descriptor_ui":"D005865","descriptor_name":"Gestational Age","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008854","descriptor_name":"Microscopy, Electron","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D010920","descriptor_name":"Placenta","qualifier_ui":"Q000098","qualifier_name":"blood supply","is_major_topic":false},{"descriptor_ui":"D010920","descriptor_name":"Placenta","qualifier_ui":"Q000166","qualifier_name":"cytology","is_major_topic":true},{"descriptor_ui":"D011247","descriptor_name":"Pregnancy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012270","descriptor_name":"Ribosomes","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012788","descriptor_name":"Shrews","qualifier_ui":"Q000033","qualifier_name":"anatomy & histology","is_major_topic":true},{"descriptor_ui":"D014327","descriptor_name":"Trophoblasts","qualifier_ui":"Q000166","qualifier_name":"cytology","is_major_topic":false}],"locations_count":2,"locations":[{"id":"doi:10.1002/aja.1001380207","doi":"https://doi.org/10.1002/aja.1001380207","is_oa":false,"landing_page_url":"https://doi.org/10.1002/aja.1001380207","pdf_url":null,"source":{"id":"https://openalex.org/S69635808","display_name":"American Journal of Anatomy","issn_l":"0002-9106","issn":["0002-9106","1553-0795"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Anatomy","raw_type":"journal-article"},{"id":"pmid:4747737","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/4747737","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The American journal of anatomy","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W1968387546","https://openalex.org/W1975178108","https://openalex.org/W1995955204","https://openalex.org/W2030459338","https://openalex.org/W2055554557","https://openalex.org/W2070874763","https://openalex.org/W2075320194","https://openalex.org/W2157325498","https://openalex.org/W2486567396"],"related_works":["https://openalex.org/W1984711817","https://openalex.org/W2090390243","https://openalex.org/W2433999572","https://openalex.org/W2146004465","https://openalex.org/W2035287706","https://openalex.org/W2053526260","https://openalex.org/W2006486468","https://openalex.org/W2040472446","https://openalex.org/W2019675515","https://openalex.org/W1995412845"],"abstract_inverted_index":{"Abstract":[0],"The":[1,111,281,309],"allantoic":[2],"placenta":[3,98],"of":[4,21,54,92,137,164,201,209,223,243,256,268,294,318,328,332],"shrews":[5],"has":[6,16],"been":[7],"classified":[8],"as":[9],"hemochorial,":[10],"endotheliochorial":[11],"and":[12,30,75,94,141,176,217,219,240,288,322],"endothelioendothelial.":[13],"Recent":[14],"confusion":[15],"centered":[17],"on":[18,31],"the":[19,27,39,59,81,96,103,138,161,165,202,226,237,241,244,253,257,277,295,302,314,329,333],"persistence":[20],"an":[22,86,181,207],"intermediate":[23,40,83],"cellular":[24],"layer":[25,41,84,91],"within":[26],"interhemal":[28,104,245,334],"membrane":[29,105,335],"its":[32,129,170],"identity.":[33],"Conflicting":[34],"interpretations":[35],"assert,":[36],"(1)":[37],"that":[38,51,80,95,116],"represents":[42],"a":[43,55,107,186,220,266,306],"continuous":[44,90],"trophoblastic":[45],"lamina":[46,255],"(endotheliochorial":[47],"placenta),":[48],"or":[49],"(2)":[50],"it":[52,117,191,264],"consists":[53],"discontinuous":[56],"\u201cmaternal":[57],"symplasma,\u201d":[58],"trophoblast":[60,112,145,177],"having":[61],"disappeared":[62],"early":[63],"in":[64,115,151,197],"development":[65],"(endothelioendothelial":[66],"placenta).":[67],"Utilizing":[68],"thin":[69],"plastic":[70],"sections":[71],"for":[72],"light":[73],"microscopy":[74,77],"electron":[76],"we":[78],"find":[79],"disputed":[82],"comprises":[85],"exceedingly":[87],"thin,":[88],"but":[89,167,190],"syncytiotrophoblast,":[93],"shrew":[97],"is":[99,113,118],"indeed":[100],"endotheliochorial.":[101],"However,":[102],"displays":[106],"most":[108],"unusual":[109],"organization.":[110],"sieve\u2010like":[114],"honeycombed":[119],"with":[120,185],"interstitial":[121,279],"(extracellular)":[122],"spaces":[123],"which":[124,274],"open":[125],"freely":[126],"at":[127],"both":[128,272],"surfaces.":[130],"Into":[131],"these":[132,143],"channels":[133],"project":[134,275],"numerous":[135],"processes":[136,155,270],"maternal":[139,204],"endothelium,":[140],"where":[142],"contact":[144],"close":[146],"junctions":[147],"are":[148,178,260,285,336],"often":[149,234,298],"apparent;":[150],"rare":[152],"instances":[153],"endothelial":[154,283],"were":[156],"seen":[157],"to":[158,160],"penetrate":[159],"fetal":[162,231,238,278,282,303],"surface":[163],"trophoblast,":[166],"not":[168],"through":[169],"well\u2010defined":[171],"basal":[172,198,227,254,307],"lamina.":[173,308],"Maternal":[174],"endothelium":[175,205,239,304],"separated":[179,262],"by":[180,265],"irregular":[182],"space":[183],"filled":[184],"dense":[187],"amorphous":[188],"material,":[189],"lacks":[192,305],"fibrillar":[193,212],"components":[194],"normally":[195],"found":[196],"membrane.":[199,229,246],"Peculiarities":[200],"hypertrophied":[203],"include":[206],"abundance":[208],"oriented":[210],"cytoplasmic":[211,269],"elements,":[213,273],"moderate":[214],"endoplasmic":[215],"reticulum":[216],"ribosomes,":[218],"marked":[221],"alignment":[222],"mitochondria":[224],"against":[225,252],"cell":[228],"Hypertrophied":[230],"mesenchymal":[232,296,310],"cells":[233,284,311,321],"intervene":[235],"between":[236],"rest":[242],"Seldom":[247],"does":[248],"either":[249],"abut":[250],"directly":[251],"trophoblast;":[258],"they":[259],"usually":[261],"from":[263,271],"welter":[267],"into":[276],"space.":[280],"somewhat":[286],"hypertrophied,":[287],"their":[289],"external":[290],"processes,":[291],"like":[292],"those":[293],"cells,":[297],"contain":[299],"glycogen.":[300],"Peculiarly,":[301],"display":[312],"all":[313],"usual":[315],"ultrastructural":[316],"characteristics":[317],"protein":[319],"synthesizing":[320],"appear":[323],"highly":[324],"active.":[325],"Functional":[326],"implications":[327],"organizational":[330],"peculiarities":[331],"discussed.":[337]},"counts_by_year":[{"year":2023,"cited_by_count":3},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-10-31T12:09:11.096373","created_date":"2016-06-24T00:00:00"}