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Latest revision as of 23:47, 3 June 2019
Fig. 21. Carnegie Embryo No. 950
Online Editor - Embryo is shown in text as female but listed in catalogue 950 as male.
29 mm., female. X 6.
Stage 8, 24 to 28 mm. CR (fig. 16, fig. 17, males; fig. 20, fig. 21, females). This stage is represented by an exceedingly interesting pair of twins. In the male (fig. 16) the nearly cylindrical phallus projects at approximately right angles to the body axis, in marked contrast to a pronounced decurvature of that of its mate (fig. 20). The glans is not so sharply demarked as in the female, although there are slight indications of its extent. The urogenital opening extends almost to the tip of the phallus as a shallow, open groove deepened basally by the caudally extended, platelike urethral folds. As a result of this increase in the folds, the base of the phallus is considerably longer than its apex. The labio-scrotal swellings are separated from the base of the phallus by broad, shallow grooves; their tips curve cranio-laterally away from the phallus, leaving a rather broad, unswollen area between the latter and the umbilical cord.
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Historic Disclaimer - information about historic embryology pages |
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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) |
Reference
Spaulding MH. The development of the external genitalia in the human embryo. (1921) Contrib. Embryol., Carnegie Inst. Wash. Publ. 81, 13: 69 – 88.
Cite this page: Hill, M.A. (2024, May 21) Embryology Spaulding-fig21.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Spaulding-fig21.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
Reference
Spaulding MH. The development of the external genitalia in the human embryo. (1921) Contrib. Embryol., Carnegie Inst. Wash. Publ. 81, 13: 69 – 88.
Cite this page: Hill, M.A. (2024, May 21) Embryology Spaulding-fig21.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Spaulding-fig21.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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