File:Frazer1914 fig01.jpg

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Fig. 1. Models of 12 mm pharynx and 16 mm Embryo

From models to show (A) floor of 12-mm. pharynx, (B) View from above of left tubo-tympanic recess in 16-mm. embryo. Somewhat diagrammatic. M., R., condensations forming Meckel's and Reichert's bars respectively ; man., position of manubrial extension from first arch. This causes depression of the neighbouring wall, with a. secondary projection, 2:, behind it.

Fig. 1 gives in outline the shape of the pharyngeal cavity in a 12-mm. embryo, and illustrates this description, showing how each broad and open recess is floored by the outer parts of the first two arches, how their grooves lie behind them and end externally in deeper lateral pouches, and how the third arch, lying between the second and third pouches, necessarily forms the short posterior boundary of the recess.

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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)
Links: Fig 1 | Fig 2 | Fig 3 | Fig 4 | Fig 5 | Fig 6 | 1914 Frazer | Pharyngeal arches | Historic Embryology Papers


Frazer JE. The second visceral arch and groove in the tubo-tympanic region. (1914) J Anat Physiol. 48(4): 391-408. PMID 17233005

Cite this page: Hill, M.A. (2024, April 12) Embryology Frazer1914 fig01.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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