Nasal placode
In this article we will explore the impact of Nasal placode on different aspects of modern society. Since its appearance on the public scene, Nasal placode has generated great interest and debate among experts and citizens alike. Its influence has spread to various areas, from politics and economics to culture and entertainment. Over the next few lines, we will analyze in detail how Nasal placode has changed the way we live, think and relate to each other.
| Nasal placode | |
|---|---|
 Nasal pit shown as olfactory pit | |
| Details | |
| Gives rise to | Olfactory epithelium |
| System | Olfactory system |
| Identifiers | |
| Latin | placoda nasalis, placoda olfactoria |
| TE | placode_by_E5.3.0.0.0.0.8 E5.3.0.0.0.0.8 |
| Anatomical terminology | |
In embryology, the nasal placode (or olfactory placode[1]) gives rise to the olfactory epithelium of the nose. Two nasal placodes arise as thickened ectoderm from the frontonasal process. They give rise to the nose, the philtrum of the upper lip, and the primary palate.
Development
During the fifth week of human embryonic development, the placodes increase in size. In the sixth week of development the centre of each placode grows inwards to form the two nasal pits. The invaginations will give rise to the olfactory epithelium that lines the roof of the nasal cavity.[2]
The nasal pits are oval shaped and they leave a raised margin which is divided into a medial nasal process and a lateral nasal process.[2]
The medial and lateral nasal process of each placode gives rise to the nose, the philtrum of the upper lip and the primary palate.[2]
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ hednk-027—Embryo Images at University of North Carolina
- ^ a b c Larsen, William J. (2001). Human embryology (3. ed.). Philadelphia, Pa.: Churchill Livingstone. pp. 353–367. ISBN 0-443-06583-7.
External links
- https://web.archive.org/web/20130509194720/http://embryology.med.unsw.edu.au/Notes/week4_3.htm#nose
- https://web.archive.org/web/20060925080120/http://www.ana.ed.ac.uk/database/humat/notes/embryo/sensory/nose.htm
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