Human anatomy, including structure and development and practical considerations . theanterior ethmoidal air-cells ; lower in the j^rooxe lies the oval or slit-like ostiumviaxillan\ the chief communication of the antrum of Hiu^hmore. When the latteris pro\ided with an additional orifice, as it is in 10 per cent. (Kallius), the smalleraccessory communication opens into the infundii)ulum a few millimeters Ijehindthe principal aperture. Above the hiatus semilunaris, either on or above thebulla, is usually seen tlie slit-like opening through which the middle ethmoidal cellscommunicate with the meat
Human anatomy, including structure and development and practical considerations . theanterior ethmoidal air-cells ; lower in the j^rooxe lies the oval or slit-like ostiumviaxillan\ the chief communication of the antrum of Hiu^hmore. When the latteris pro\ided with an additional orifice, as it is in 10 per cent. (Kallius), the smalleraccessory communication opens into the infundii)ulum a few millimeters Ijehindthe principal aperture. Above the hiatus semilunaris, either on or above thebulla, is usually seen tlie slit-like opening through which the middle ethmoidal cellscommunicate with the meatus. The Inferior Meatus.—This passage (meatus nasi inferior), the largest of thethree, measures from cm. in length, its anterior end lying from the tip of the nose. At first relatively contracted, it abruptly expands, not Fio. 1176. Scalp Cerebral hemisphere Sui)frior lonKiludiiial sinusBone Falx cerebri Ethmoidal cells Lower end of probe lyinjj in hiatus semilunaris Middle turbinate Probe passing: from antrum into iiiiundibiilum Inferior turbinate. Nasal septum HV*,aii!i8tt*!**!, Right eyeball Hiatus semilunarisV-;/ Middle meatus / -Maxillary sinus -Inferior meatus«-Floor of nasal fossaOral mucous membrane 1 ongue Frontal section of head, viewed from behind, showing nasal fosScE and communiLalionswith frontal and maxillary sinuses. only in height, in correspondence with the arched attached border of the lowerturbinate, but also in width. Farther backward, it gradually diminishes and is againreduced at its choanal end. On the lateral wall of the inferior meatus, usually cm. behind the posterior margin of the nostril, after remo\al of the lowerturbinate, may be seen the opening of the naso-lachrymal duct. The position andform of the orifice are subject to much variation. When close to the arching attachedborder of the concha, the aperture is usually oval or even round ; when its positionis lower, it is narrow and slit-like, obliquely v
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
