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File:Bulletins de l'Académie royale des sciences, des lettres et des beaux-arts de Belgique (1885) (20313365530).jpg

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Title: Bulletins de l'Académie royale des sciences, des lettres et des beaux-arts de Belgique
Identifier: bulletinsdelacad391885acad (find matches)
Year: 1885 (1880s)
Authors: Académie royale des sciences, des lettres et des beaux-arts de Belgique
Subjects: Learned institutions and societies; Science
Publisher: Bruxelles
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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( 404 ) Embryons. Les embryons des blastodermes dont nous venons d'étu- dier la portion extra-embryonnaire, quel que soit leur développement, peuvent se diviser en trois parties : une antérieure, une moyenne et une postérieure; les deux premières comprennent toute la partie de l'embryon dans laquelle le tube digestif est nettement circonscrit; la der- nière est constituée par le bord postérieur de l'embryon et se confond avec le bord postérieur du blastoderme. La partie antérieure, complètement libre, proémine plus ou moins en avant et en haut au-dessus du centre de la portion extra-embryonnaire du blastoderme. Dans toute cette partie le tube digestif, circonscrit de toute part, a une forme assez régulièrement cylindrique et se termine en avant dans un cul-de-sac arrondi. (Voir fig. 4 sa coupe transversale; fig. 7 (a) sa coupe longitudinale.)
Text Appearing After Image:
Fig. 4. La partie moyenne de l'embryon est, au contraire, adhé- rente au blastoderme. Dans son ensemble elle constitue une gouttière dont la concavité regarde vers le bas et dont les bords se continuent de chaque côté avec le restant du blas- toderme. Dans toute cette partie moyenne le tube digestif n'a pour paroi inférieure que le vitellus et le feuillet épi- thélial ne circonscrit que ses parois latérales et sa face

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https://www.flickr.com/photos/internetarchivebookimages/20313365530/

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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
ser.3-t.9
Flickr tags
InfoField
  • bookid:bulletinsdelacad391885acad
  • bookyear:1885
  • bookdecade:1880
  • bookcentury:1800
  • bookauthor:Acad_mie_royale_des_sciences_des_lettres_et_des_beaux_arts_de_Belgique
  • booksubject:Learned_institutions_and_societies
  • booksubject:Science
  • bookpublisher:Bruxelles
  • bookcontributor:Harvard_University_Museum_of_Comparative_Zoology_Ernst_Mayr_Library
  • booksponsor:Harvard_University_Museum_of_Comparative_Zoology_Ernst_Mayr_Library
  • bookleafnumber:418
  • bookcollection:museumofcomparativezoology
  • bookcollection:biodiversity
  • bookcollection:Harvard_University
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
12 August 2015


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