File:Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus (1953) (20643735746).jpg

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Title: Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus
Identifier: comparativeembry00nels (find matches)
Year: 1953 (1950s)
Authors: Nelsen, Olin E. (Olin Everett), b. 1898
Subjects: Vertebrates -- Embryology; Comparative embryology
Publisher: New York, Blakiston
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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REPRODUCTIVE SYSTEM OF THE FEMALE 59 through the hilus are to be found the blood and lymph vessels which supply the ovary (fig. 30). The ovary of the teleost fish is a specialized, compact type of ovary adapted to the ovulation of many thousands, and in pelagic species, millions of eggs at one time. It has an elongate hilar aspect which permits blood vessels to enter the ovarian tissue along one surface of the ovary, whereas the opposite side is the ovulating area. In many teleosts the ovulating surface possesses a special sinus-like space or lumen (fig. 28) which continues posteriad to join the very short oviduct. At the time of ovulation the eggs are discharged into this space and move caudally as the ovarian tissue contracts. In other teleosts this ovulatory space is not a permanent structure but is formed only at the time of ovulation. In Tilapia macrocephala, for example, the ovulatory lumen is formed on the side of the ovary opposite the area where the blood vessels enter. The formation of this space at the time of ovulation is described by Aronson and Holz-Tucker ('49) as a rupture of the elastic follicles during ovulation whereupon the follicle walls shrink toward the ovarian midline, l-r— /—U T E RU
Text Appearing After Image:
INFUNDIBULUM FALLOPIAN TUBE OVARY RECTUM URINARY BLADDER BIG BONE URETHRA VA G I N A CLITORIS LABIUM MINUS LABIUM MAJUS Fig. 29. Diagrammatic representation of a midsagittal section of the reproductive organs of the human female. (Slightly modified from Morris: Human Anatomy, Phila- delphia, Blakiston.)

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  • bookid:comparativeembry00nels
  • bookyear:1953
  • bookdecade:1950
  • bookcentury:1900
  • bookauthor:Nelsen_Olin_E_Olin_Everett_b_1898
  • booksubject:Vertebrates_Embryology
  • booksubject:Comparative_embryology
  • bookpublisher:New_York_Blakiston
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:85
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
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18 August 2015

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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/20643735746. It was reviewed on 17 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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current23:34, 17 September 2015Thumbnail for version as of 23:34, 17 September 20151,424 × 1,528 (546 KB) (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Title''': Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus<br> '''Identifier''': comparativeembry00nels ([https://commons.wikim...

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