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1 NASAL CAVITY. Cavitas nasalis. ABC

2 Nasal openings (nostrils). Nares. They are surrounded by the nasal alae and nasal septum. B C

3 Choanae. Posterior openings of nasal cavity. C

4 Nasal septum. Septum nasale. Nasal partition comprised of bony, cartilaginous and membranous parts. C

5 Membranous part. Pars membranacea. Connective tissue portion of nasal septum at the tip of the nose. C

5 a Cartilaginous part. Pars cartilagina. Portion of the nasal septum situated between the membranous and bony parts.

6 Bony part of nasal septum. Pars ossea. Perpendicular plate of ethmoid and vomer. C

7 Vomeronasal (Jacobson's) organ. Organum vomeronasale. Blind sac occasionally present above the incisive canal. It is a vestige of an earlier phylogenetic accessory organ of smell. A C

8 Vestibule of nose. Vestibulum nasi (nasale). Anterior segment of nasal cavity extending up to the limen nasi. It is covered by squamous epithelium which changes to ciliary epithelium at the limen. A B

9 Limen nasi. Ridge at the end of the vestibule produced by the margin of the alar cartilage. A B

10 Olfactory sulcus. Sulcus olfactorius. Groove on the olfactory area passing between the root of the middle nasal concha and the bridge of the nose. A B

11 Superior nasal concha (turbinate). Concha nasalis superior. Small, upper concha situated in front of the sphenoidal sinus. A B

12 Middle nasal concha (turbinate). Concha nasalis media. Most of the openings of the paranasal sinuses lie below it. A B

13 Inferior nasal concha (turbinate). Concha nasalis inferior. Lowest and longest of the nasal conchae. It covers the opening of the nasolacri-mal duct. A B

14 [[Tunica mucosa nasi]]. Nasal mucous membrane consisting primarily of pseudostratified ciliated columnar epithelium with goblet cells.

15 Respiratory region. Regio respiratoria. Part of the nasal mucosa with ciliated epithelium. It begins in the vestibule and lines the entire nasal cavity except for the olfactory region.

16 Olfactory region. Regio olfactoria. Area about the size of a nickel containing olfactory cells; it is located superiorly on the nasal septum and on the lateral nasal wall below the cribriform plate. A

16a Nasal (olfactory) glands. Glandulae nasales. Predominantly serous, tubular glands. Their thin secretions cleanse the olfactory epithelium and can enhance odorous substances.

Feneis, Pocket Atlas of Human Anatomy © 2000 Thieme

17 Cavernous plexus of concha. Plexus cavernosi concharum. Venous plexuses especially prevalent in the region of the inferior concha and posterior nasal cavity.

18 Agger nasi. Ridge-like elevations comprising the remains of an earlier accessory concha directly in front of the middle nasal concha. A

19 Sphenoethmoidal recess. Recessus sphenoeth-moidalis. Recess above the superior nasal concha between the anterior wall of the sphe-noidal sinus and the roof of the nasal cavity. A

20 Superior nasal meatus. Meatus nasi superior. Nasal passage above the middle nasal concha. A

21 Middle nasal meatus. Meatus nasi medius. Nasal passage between the middle and inferior nasal concha. A

22 Atrium of middle meatus. Atrium meatus medii. Area at the beginning of the middle meatus in front of the middle and above the inferior concha. A

23 Inferior nasal meatus. Meatus nasi inferior. Lower nasal passage between the inferior nasal concha and the floor of the nasal cavity. A

23 a Aperture of nasolacrimal duct. Apertum duc-

tus nasolacrimalis. Opening of the nasolacrimal duct provided with a flap-like mucosal fold. See p. 364.23

24 Nasopharyngeal meatus. Meatus nasopharyn-geus. Junction of the three nasal passages behind the conchae. A

25 Incisive duct. [Ductus incisivus]. Blind sac occasionally present on the floor of the nasal cavity near the septum, about 2 cm behind the external nasal opening. A

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