File:The evolution of man- a popular exposition of the principal points of human ontogeny and phylogene (1896) (14595110908).jpg

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Identifier: evolutionofmanpo02hae (find matches)
Title: The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene
Year: 1896 (1890s)
Authors: Haeckel, Ernst, 1834-1919
Subjects: Evolution Embryology, Human Anatomy, Comparative Human beings
Publisher: New York, Fowle
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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and blood-vessels, and surrounded by acell-layer (the epithelium of the ovary, or the female germ-epithelium). From this epithelium, cords of cells growinward, into the connective tissue or stroma of theovary (Fig. 330, A, b). Single cells of these cords increasein size and become egg-cells (primitive eggs, A, c); but thegreater number of the cells remain small and form anenveloping and nutritive cellular layer (the foUicle-epi-thehum) round each egg. In Mammals the follicle-epithelium is at first one-layered (Fig. 330, B, 1), afterwards many-layered (B, 2). Inall other Vertebrates, the egg-cell is, indeed, enclosed in apermanent covering of small cells, an egg-follicle; but onlyin Mammals does fluid accumulate between the growingfoUicle-cells, and thus extends the follicle into a roundbladder of considerable size, on the inner waJl of whichthe egg lies excentrically. In this point, as in his wholeMorphology, Man unmistakably indicates his descent fromMammala 426 THE EVOLUTION OF MAN.
Text Appearing After Image:
Fig. 330, A, Fig. 330, B.

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Flickr tags
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  • bookid:evolutionofmanpo02hae
  • bookyear:1896
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:Haeckel__Ernst__1834_1919
  • booksubject:Evolution
  • booksubject:Embryology__Human
  • booksubject:Anatomy__Comparative
  • booksubject:Human_beings
  • bookpublisher:New_York__Fowle
  • bookcontributor:Smithsonian_Institution_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:457
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
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30 July 2014



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