File:Ingalls1918 plate 3 fig4.jpg

Plate 3

1 to 5. The following drawings (indicated by D in the text-figures) are obviously reconstructions and therefore somewhat schematic. They would cut the median line at or near the points traversed by the sections shown in the photographs (Plate 2. figs. 1 to 4), and have therefore been designated by the same section number. In otherwords section (photograph) 425 and drawing (section) 42;j would intereect in tlie median line. Like the photographs ihey are slightly oblique dorsoventrally.

1. (Section) 425. Posterior part of primitive streak. X 100.
2. (Section) 406 +. Dorsal opening of archenteric canal. X 100.
3. (Section) 401. Typical head process, archenteric canal, "plaque notochordale' and "plaque lec'ithoenterique." X 100.
4. (Section) 394 +. Large ventral opening, "plaque notochordale." X 100.
5. Idealized cross-section (reconstruction) at the point where all three germ-layers; are continuous. Its location, while not indicated, can be made out from text-figure 5.

Contribution No.23: Figures | Plate 1 | Plate 2 | Plate 3 | Plate 4 | Plate 1 | Carnegie - Contributions to Embryology | Carnegie stage 8 | Category:Carnegie Stage 8 | Historic Embryology Papers

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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

Ingalls NW. A human embryo before the appearance of the myotomes. (1918) Contrib. Embryol., Carnegie Inst. Wash. No.23 Publ. 227, 7:111-134.

Cite this page: Hill, M.A. (2024, April 20) Embryology Ingalls1918 plate 3 fig4.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Ingalls1918_plate_3_fig4.jpg

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Historic Disclaimer - information about historic embryology pages

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)