File:HillFlorian1931 text-fig01.jpg

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Text-Fig. 1. Graphic reconstruction of the dorsal view of the embryonic formation Dobbin embryo

Outlines of the embryonal shield (E.s.), yolk-sac (Y.s.) and connecting stalk ( indicated by a thick line-; outlines of the allantoic canal (ALI = tubular part, AL2 =2: vesicular part) indicated by interrupted lines; outline of the caudal end of the amniotic cavity (Amn.) dotted; cloacal membrane (UL) lined longitudinally where indistinct, cross—hatched where distinct ; P7‘..S‘. =2 primitive streak; chorda process and chorda canal lined transversely; lateral mesodermal bands lined transversely and dotted; ventral openings of the chorda canal marked by arrows on the right, its dorsal opening by an arrow on the left. ++ = HENSEN’s knot ; prochordal plate marked by large dots. On the scale is indicated the level of every fifth section. The median plane is indicated by an arrow. X 75.

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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)


Hill JP. and Florian J. A young human embryo (embryo dobbin) with head-process and prochordal plate. (1931) Phil. Tran. Roy. Soc. London B, 219: 443-486.

Cite this page: Hill, M.A. (2024, May 20) Embryology HillFlorian1931 text-fig01.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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