File:Frazer1922 fig02.jpg

Fig 2. Pharynx, 16 mm Embryo

A, dorsal aspect of recess; I and II, 1st and 2nd pouches;

B, view from outside, below, and behind, showing area of manubrial invasion, uninvaded remnant of 2nd arch, 2nd pouch, and, internal to these, the impression of the forward growth.

I have given drawings in previous papers illustrating the stages of the growth, and I need only now refer to fig. 2 as showing its definite position. The first view is of the recess in a 16 mm. embryo, seen from above: B shows the recess laterally from below and slightly from behind. The triangular area labelled as 2nd arch is the part related to Reichert’s bar, but the bar is separated from the recess, further in, by the forward growth, which therefore shows in the model as a hollow between the arch area and the pharynx.

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Reference

Frazer JE. The early formations of the middle ear and eustachian tube - a criticism. (1922) J Anat. 57(1): 18-30. PMID 17103958

Cite this page: Hill, M.A. (2024, April 27) Embryology Frazer1922 fig02.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Frazer1922_fig02.jpg

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