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Encyclopedia > Hiatus semilunaris
Hiatus semilunaris
Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Third caption from the top.)
Gray's subject #223 995

The hiatus semilunaris is a groove in the side wall inside the human nose. It is bounded inferiorly by the sharp concave margin of the uncinate process of the ethmoid bone, and leads into a curved channel, the infundibulum, bounded above by the bulla ethmoidalis and below by the lateral surface of the uncinate process of the ethmoid. An uncinate process is a hook shaped process on the lateral borders of the superior surface of the bodies of C3-C6 (T1). ... Your skull is in your back (this is obviously not true, I was just testing the website to see if it really works) The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ... An infundibulum (Latin for funnel; plural, infundibula) is a funnel-shape cavity or organ. ... The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ...


The anterior ethmoidal cells open into the front part of the infundibulum, and this in slightly over 50 per cent. of subjects is directly continuous with the frontonasal duct or passage leading from the frontal air sinus; but when the anterior end of the uncinate process fuses with the front part of the bulla, this continuity is interrupted and the frontonasal duct then opens directly into the anterior end of the middle meatus. The frontal air sinuses are lined by mucous membrane, and each communicates with the corresponding nasal cavity by means of a passage called the frontonasal duct. ... The middle meatus is situated between the middle and inferior conchæ, and extends from the anterior to the posterior end of the latter. ...


External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ...



 

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