From Embryology

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Fig. 62. Cross sections of an egg-cylinder of the white rat, 8 days and 17 hours after insemination


  • A, section which corresponds to a level just above the two crosses in Fig. 61, D.
  • B, section which corresponds to a level about half an inch below the two crosses in Fig. 61, D.


  • ex.ect. - extraembryonic ectoderm
  • p.ect. - transitory ectoderm (original wall of blastocyst)
  • pr.c. - proamniotic cavity
  • pr.emb.ect. - primary embryonic ectoderm
  • Pr.emb.ent. - primary embryonic entoderm
  • v.ent. - visceral entoderm

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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)


Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.

Cite this page: Hill, M.A. (2024, April 25) Embryology Bailey062.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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current16:58, 17 January 2011Thumbnail for version as of 16:58, 17 January 2011673 × 368 (70 KB)S8600021 (talk | contribs) {{Template:Bailey 1921 Figures}}