From Embryology

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Fig. 472. From a section through the head of a human embryo of 28 mm


Showing the nasal septum, the nasal cavities, the oral cavity, and the palatine processes.

Jacobson's organ arises at the beginning of the third month as a small outpocketing of the epithelium on the lower anterior part of the nasal septum (Fig. 472). This evagination grows backward as a slender sac along the nasal septum for a distance of several millimeters and ends blindly. In the adult the sac degenerates and often disappears. In some of the lower Mammals Jacobson's organ develops to a greater degree, and some of the epithelial cells send out processes which pass to the olfactory lobes.

Links: Historic terminology

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Cite this page: Hill, M.A. (2024, February 22) Embryology Bailey472.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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