File:Bailey156.jpg

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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Reference

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

Cite this page: Hill, M.A. (2024, April 19) Embryology Bailey156.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey156.jpg

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