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Fig. 50. Transverse section of blastoderm of chick (40 hours' incubation)

Hertwig.

Section taken short distance anterior to Hensen' node.

"The notocord develops out of the fused mass of entoderm and mesoderm of the primitive axis, whether from the one layer or the other being difficult to determine. It thus becomes a rod of cells extending forward from the front end of the primitive streak and separating the mesoderm on one side from that on the other. The formation of the notocord as the axial structure of the future embryo destroys the primitive axis, and the entoderm now becomes a distinct and separate layer (Fig. 50)."


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Pages where the terms "Historic" (textbooks, papers, people, recommendations) 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, interpretations and recommendations 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. (2024, June 14) Embryology Bailey050.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey050.jpg

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