File:Dickie1914 fig07.jpg

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Fig. 7. Lateral wall of the nasal cavity

Showing the concha inferior, the commencement of the infundibulum ethmoidale, and the first ethmo-turbinal.

The nasal cavities open in front by the anterior nares and communicate with the buccal cavity by means of primitive choanae, which are oval openings in the roof of the mouth. Their greatest diameters are in the antero-posterior direction. The anterior nares are narrow, and their lumina are almost entirely occluded by epithelial plugs, as is usual at this stage. Behind this point the cavity increases rapidly in its vertical diameter. The floor slopes down from the anterior orifice to the anterior border of the choana, and is formed entirely by primitive palate; while the roof runs first upwards and backwards, and then arches downwards to the posterior end of the choanal orifice. The lateral wall (fig. 7) is as yet fairly simple.

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Dickie JK. The anatomy of the head end of a 20 mm human embryo. (1914) J Anat Physiol., 48(4): 445-60. PMID 17233010

Cite this page: Hill, M.A. (2024, May 30) Embryology Dickie1914 fig07.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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