File:Rugh 155.jpg

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Sections through the gonads of Anurans before and after differentiation

(Top left) Section through the gonad of a 30 mm tadpole. Note the migration of sex cord elements into the gonad, and the appearance of the primary genital tubules of the otherwise normal male frog, and hermaphrodites have been described. These facts simply emphasize the fundamental similarity of the frog ovary and testis, both in origin and in early development.

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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)
Frog Development (1951): 1 Introduction | 2 Rana pipiens | 3 Reproductive System | 4 Fertilization | 5 Cleavage | 6 Blastulation | 7 Gastrulation | 8 Neurulation | 9 Early Embryo Changes | 10 Later Embryo or Larva | 11 Ectodermal Derivatives | 12 Endodermal Derivatives | 13 Mesodermal Derivatives | 14 Summary of Organ Appearance | 15 Glossary | 16 Bibliography | Figures


Rugh R. Book - The Frog Its Reproduction and Development. (1951) The Blakiston Company.

Cite this page: Hill, M.A. (2024, April 25) Embryology Rugh 155.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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current13:02, 25 April 2013Thumbnail for version as of 13:02, 25 April 2013720 × 1,000 (266 KB)Z8600021 (talk | contribs)
13:01, 25 April 2013Thumbnail for version as of 13:01, 25 April 2013720 × 1,000 (266 KB)Z8600021 (talk | contribs){{Rugh1951 footer}} Category:Genital