. Anatomy, descriptive and applied. Anatomy. THE NASAL FOSS^ 1083 The nasal duct opens into the anterior part of the inferior meatus, the opening being frequently overlapped by a fold of mucous membrane.' The Inner Wall (Fig. 799).—The inner wall or septum is frequently more or less deflected from the mesal plane (Fig. 799), thus limiting the size of one fossa and increasing that of the other. Ridges or spurs of bone growing outward from the septum are also sometimes present. Immediately over the incisi\e foramen at the lower edge of the cartilage of the septum a depression, the nasopalatine r
. Anatomy, descriptive and applied. Anatomy. THE NASAL FOSS^ 1083 The nasal duct opens into the anterior part of the inferior meatus, the opening being frequently overlapped by a fold of mucous membrane.' The Inner Wall (Fig. 799).—The inner wall or septum is frequently more or less deflected from the mesal plane (Fig. 799), thus limiting the size of one fossa and increasing that of the other. Ridges or spurs of bone growing outward from the septum are also sometimes present. Immediately over the incisi\e foramen at the lower edge of the cartilage of the septum a depression, the nasopalatine recess {recessus nasopalathms), may be seen. In the septum close to this recess a minute orifice may be discerned; it leads into a blind pouch, the rudimentary organ of Jacobson {organon wmeronasale), which is well developed in some of the lower animals, but is rudimentary in man. The organ is supported by a plate Eye ball J oijve (hiatus semilunaris) leading to infundibiUum Middle turbinated vrocejis Middle meatus Turbinated boiie. f Buccal cai ity \ ^pace beiueen cheek and gum Molai tooth upper jaw Root t-J molar tooth Fig. 799—Tr: Tongue Hard palnf' Nasal septum ^ vertical section of the nasal fossje. Tlie section i processes. (Cryer.) made anterior to the superior turbinated of cartilage, distinct from the cartilage of the septum, tlie cartilage of Jacobson (p. 1080). The cartilage of Jacobson is to the outer side of the lower edge of the cartilage of the septum. Just below the opening of the blind poucli is an ele- vation, tlie eminence of Jacobson. The Mucous Membrane (membrana mucosa nasi).—The mucous membrane lining the nasal fossse is sometimes called the Schneiderian It is closely adherent to the periosteum or perichondrium, upon \Ahich it lies. It is continuous externally with the skin through the anterior nares, and with the mucous mem- brane of the nasopharynx through the posterior nares. From the nasal fosste its continuity may be traced with the c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
