File:Chick embryo. longitudinal section of a chick of the fourth day.jpg

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Description Fig. 81. Diagrammatic longitudinal section of a chick of the fourth day (after Allen Thomson). ep, epiblast ; hy, hypoblast ; sm. somatopleure ; vm. splanchnopleure ; af. pf. folds of the amnion ; pp. pleuroperitoneal cavity ; am. cavity of the amnion ; al. allantois; a. position of the future anus ; h. heart ; z. intestine ; vi. vitelline duct ; ys. yolk; s. foregut ; m. position of the mouth ; me. mesentery.
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Source https://www.flickr.com/photos/internetarchivebookimages/20534518790/ https://archive.org/details/cu31924000353601/page/75/mode/1up?view=theater A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction. New York, D. Appleton.
Author Mills, Wesley, 1847-1915

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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.


This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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This image, originally posted to Flickr, was reviewed on 21 February 2024 by the administrator or reviewer Abzeronow, who confirmed that it was available on Flickr under the stated license on that date.

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current19:27, 14 February 2024Thumbnail for version as of 19:27, 14 February 20241,344 × 534 (307 KB)Rasbak (talk | contribs){{Information |description=Fig. 81. Diagrammatic longitudinal section of a chick of the fourth day (after Allen Thomson). ep, epiblast ; hy, hypoblast ; sm. somatopleure ; vm. splanchnopleure ; af. pf. folds of the amnion ; pp. pleuroperitoneal cavity ; am. cavity of the amnion ; al. allantois; a. position of the future anus ; h. heart ; z. intestine ; vi. vitelline duct ; ys. yolk; s. foregut ; m. position of the mouth ; me. mesentery. |date= 1819 |source=https://www.flickr.com/photos/intern...

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