File:West02.jpg

Fig. 2

The pharynx, as a whole (Text-fig. 2), is concave dorsally from side to side on its dorsal surface and concave ventrally on its ventral surface.

The floor is marked in its most anterior part by a deep median groove, and a much shallower groove likewise marks the dorsal wall, or roof. At the point of attachment of the pharyngeal membrane the groove on the roof of the pharynx is continued on to the roof of the mouth, and there it divides into two limbs with a rounded ridge between them; this ridge is due to the down growth of the forebrain and emphasises the close relationship between brain and pharynx at this point; just to the cranial side of the pharyngeal membrane the pouch of Rathke shows as a small diverticulum of the mouth cavity; Seessel's pouch cannot be identified.

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Reference

West CM. A human embryo of twenty-five somites. (1937) J. Anat., 71(2): 169-200.1. PMID 17104635

Cite this page: Hill, M.A. (2024, May 18) Embryology West02.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:West02.jpg

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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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Reference

<pubmed>17104635</pubmed>| PMC1252340