Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . THE SPECIAL. SENSE-ORGANS 889 common snail, the cochlea. A spiral bony shelf, projectingfrom the center of the coil, divides the canal of the cochleaincompletely into two passages, the upper termed the scalavestibuli, and the lower thescala tympani, which communi-cate at the top. The Organ of Smell.—Thesense-organ of smell is situatedin the nose, and may be con-sidered as divided into an ex-ternal or projecting part, andan internal part or nasal cav-ity. The upper
Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . THE SPECIAL. SENSE-ORGANS 889 common snail, the cochlea. A spiral bony shelf, projectingfrom the center of the coil, divides the canal of the cochleaincompletely into two passages, the upper termed the scalavestibuli, and the lower thescala tympani, which communi-cate at the top. The Organ of Smell.—Thesense-organ of smell is situatedin the nose, and may be con-sidered as divided into an ex-ternal or projecting part, andan internal part or nasal cav-ity. The upper part of thenose is formed by the nasal ^, ^, ^, ; The Cochlea. bones proper and by the nasal processes of the superior maxillary bones. At the lower partare two horizontally placed openings, the nostrils, across whichsome stiff hairs usually project, forming passages into the in-ternal part of the nose. These passages are separated by a ver-tical cartilaginous septum, continuous with the vomer bone,while the outer walls of the passages are formed on each side byan upper lateral and a lower lateral cartilage. To these are a
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmedicin, bookyear1920
