File:Streeter1957 plate01.jpg

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Plate 1. Photographs of the cornea in embryos stage 19-23

Photographs of the cornea in embryos belonging to horizons xix to xxiii.

A segment of the cornea near the mid-line is shown in an embryo of each horizon. The mesoclermal component is a thin layer one or two cells thick in the youngest stage. The stroma gmclually increases in thickness, and the cells at the inner border form a mesothelium. In the oldest specimen (Hg. 13), :1 part of the lens is included. The pupillary membrane is seen in the space between the mesothelium (Descement's) and the epithelium of the lens.

Fig. 14. No. 5609, xix, I5-I-I x 800.

Fig. 15. No. 431, xx, 37-2-2, x800.

Fig. 16. No. 1358F, xxi, 7-2-1, x800.

Fig. 17. No. 3681, xxii, 32-2-4, x800.

Fig. 18. No. 4570, xxiii, 70-3-4, x800.

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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)
Links: 1 Graph Embryos 11-23 | 4 Eye and optic nerve 19-23 | Plate 1 - Cornea | Plate 2 - Hypophysis


Streeter GL. Developmental Horizons In Human Embryos Description Or Age Groups XIX, XX, XXI, XXII, And XXIII, Being The Fifth Issue Of A Survey Of The Carnegie Collection. (1957) Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36: 167-196.

Cite this page: Hill, M.A. (2024, April 24) Embryology Streeter1957 plate01.jpg. Retrieved from

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