From Embryology

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Fig. 485. Diagrammatic longitudinal section of selachian embryo

selachian - belonging to the order Selachii of elasmobranch fishes that includes the sharks and in some classifications also the rays and skates.


a., Anus; d., yolk sac; dn., intestinal umbilicus; ds., visceral layer of yolk sac; hs., parietal layer of yolk sac; hn., dermal umbilicus; lh l , coelom; lh 2 , exoccelom; m., mouth; st., yolk stalk.

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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, February 22) Embryology Bailey485.jpg. Retrieved from

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current00:41, 2 February 2011Thumbnail for version as of 00:41, 2 February 2011583 × 425 (57 KB)S8600021 (talk | contribs){{Template:Bailey 1921 Figures}} Category:Coelom