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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.
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.


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[[Category:Historic Embryology]] [[Category:Human]] [[Category:Smell]] [[Category:Respiratory]]
[[Category:Historic Embryology]] [[Category:Human]] [[Category:Smell]] [[Category:Respiratory]]

Revision as of 12:04, 31 March 2012

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

Peter.

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.



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Cite this page: Hill, M.A. (2024, April 20) Embryology Bailey472.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey472.jpg

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