From Embryology

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


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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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

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