Human anatomy, including structure and development and practical considerations . especially inthe lower, the line approaches the teeth as it passes backward. There is a distinctfold or fnniini of mucous membrane passinjj;^ from the anterior nasal sj)ine to themiddK of the upper lip. The free edj^e is often irrei^ular. and may have a nodularenlarij^ement. A much smaller fold is often found on each side in the region ofthe bicusjjiils. A median fold to the lower lip is small and inconstant. lips present a red region of modified mucous membrane, intermediate betweenthe skin of the
Human anatomy, including structure and development and practical considerations . especially inthe lower, the line approaches the teeth as it passes backward. There is a distinctfold or fnniini of mucous membrane passinjj;^ from the anterior nasal sj)ine to themiddK of the upper lip. The free edj^e is often irrei^ular. and may have a nodularenlarij^ement. A much smaller fold is often found on each side in the region ofthe bicusjjiils. A median fold to the lower lip is small and inconstant. lips present a red region of modified mucous membrane, intermediate betweenthe skin of the face and the mucous membrane of the mouth. A sagittal sectionthrough either lip shows these three parts. In the new-born the intermediate partis subdivided into two, of which the inner—rather the broader—more closely resem-bles true mucous membrane than the latter. After death in the young child itassumes a brownish color, which has been mistaken for the effect of acid. In theadult these two subdi\isions lose their distinctness. The lower lij) is the larger and Fig. MiddleturbinateZygomaNasal septum Maxillary sinusInferior turbinate Mucous mem-brane cover-ing palate Vestibule •—Tongue Submaxillary duct—Lingual nerve Sublinsrual gland Submental artery Facial arteryMandible Platysma Anterior belly of digastric Genio-hyoid Genio-glossus Frontal section, showing oral cavity and lower part of nasal fossae; plane of section passes through anterior end of zygoma. Three-fourths natural size. fuller, showing more red except towards the angles of the mouth, where it disap-pears. Its lower border is slightly indented in the middle. The upper lip shows amore marked indentation below a little gutter, \\\q p/ii/lrnui, running down from thenasal septum. A slight median prominence of the lower edge of the upper lip is thetubercle, which interrupts the straightness of the cleft when the lips are closed, makingthe line resemble a Cupids bow. * The muscles of the lips are a comp
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
