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Fig. 156. Surface views of chick blastoderms

a, Blastoderm with primitive streak and head process; showing blood islands (dark spots in crescent-shaped area in lower part of figure).

b, Blastoderm with 6 pairs of primitive segments. Reticulated appearance is due to blood islands (dark spots) and to developing vessels, the entire reticulated area being the area vasculosa.

Ruckert, Hertwig.


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Pages where the terms "Historic Textbook" and "Historic Embryology" appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms and interpretations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.



Cite this page: Hill, M.A. (2018, December 10) Embryology Bailey156.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey156.jpg

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current15:08, 18 January 2011Thumbnail for version as of 15:08, 18 January 2011921 × 617 (150 KB)S8600021 (talk | contribs)==Fig. 156. Surface views of chick blastoderms== a, Blastoderm with primitive streak and head process; showing blood islands (dark spots in crescent-shaped area in lower part of figure). b, Blastoderm with 6 pairs of primitive segments. Reticulated app
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