File:GladstoneHamilton1941 text-fig05.jpg

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Text-fig. 5. General view of the embryonic disc in the region of Hansen's knot

The section is to one side of the blastopore (compare with Pl. 2, fig. 4). Vascular spaces containing a few fi'ee developing blood corpusoleslare visible in the lower part of the section; they are lined on their distal aspect and sides by endothelioid cells with rounded or lens-like nuclei; on the central side, however, the mesothelial layer is often defective and the wall of the space is formed by entoderm. Section no. 47. x 100.


Gladstone RJ. and Hamilton WJ. A presomite human embryo (Shaw) with primitive streak and chorda canal with special reference to the development of the vascular system. (1941) Amer. J Anat. 76(1): 9-44.

Cite this page: Hill, M.A. (2024, February 28) Embryology GladstoneHamilton1941 text-fig05.jpg. Retrieved from

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