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Plate 28

Figs. 33 a, 33 6, 33 c—Blastocyst 38, sections 1/2, 16/1, and 2/2 (x 400). In fig. 33 a, which passes through the central region of the embryonal ecto- derm (e.ect.), the covering trophoblast has disappeared and a slight depression is present on the surface of the ectodermal mass, the cells of which are now assuming a columnar arrangement. The covering trophobla3t ( is still present over the more peripheral portion of the embryonal ectoderm (figs. 33 6 and 33 c).

Fig. 34.—Blastocyst 42. Section 7/2 ( x 420). sh.ect., shield-ectoderm.

Plates: Plate 24 | Plate 25 | Plate 26 | Plate 27-1 | Plate 27-2 | Plate 28-1 | Plate 28-2 | Plate 29

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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)
1924 Cat Development: 1. Ovum of the Cat | 2. Process of Cleavage | 3. Formation of the Blastocyst | 4. Discussion | Plates | cat


Hill, J. P., and Tribe, M. 1924. The early development of the cat (Felis domestica). Quart. J. Microsc. Sci, 68, 513-602.

Cite this page: Hill, M.A. (2024, April 13) Embryology Hill1924 plate28-2.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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