Physiology : a manual for students and practitioners . elial tissue,the membranous labyrinth, which fol-lows the bony structure and containsa colorless fluid, the endolymjjh, and afluid stirrounds this membranous laby-rinth, the perilymph. What is the fiinction of the semicir-cular canals?These canals are arched cylindricalspaces in the solid bone which open ateach end of the arch in the are three in number, and twoare nearly vertical and one is horizontalin such a manner that the planes of the two vertical canals are atright angles, one being fore and aft, and the other transve
Physiology : a manual for students and practitioners . elial tissue,the membranous labyrinth, which fol-lows the bony structure and containsa colorless fluid, the endolymjjh, and afluid stirrounds this membranous laby-rinth, the perilymph. What is the fiinction of the semicir-cular canals?These canals are arched cylindricalspaces in the solid bone which open ateach end of the arch in the are three in number, and twoare nearly vertical and one is horizontalin such a manner that the planes of the two vertical canals are atright angles, one being fore and aft, and the other transverse (). Their use does not seem to be directly connected with theauditory function of the part, but to be connected more with thesense of equilibrium. The movement of the fltiids in the canals,arranged in the directions of the three dimensions, may serve toproduce sensations which lead to the formation of accurate judg-ment of changes in the position of the body. What is the cochlea? It is a part of the labyrinth which derives its name from its. External View of a fast of the LeftLabj-riuth (Heiile): /, fenestracochleie, or round window; a,fenestra vestibuli, or oval win-dow ; 6, ampulla of superior semi-circular canal; d, common shaftof union of these two canals; e,ampulla of the horizontal semi-circular canal; g, tractus spiralisforaniinosus. These canals are arranged 158 THE SENSES. resemblance to a snail-shell. It is divided into two parts, by bonyand membranous structures, which run parallel from base to apexof the spiral (Fig. 45). The upper passage opens into the vesti- FiG. 45.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiology, bookyear1
