. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Coch. Fig. 410. Fio. 409. Fig. 409.—Auditory epithelium from macula acoustica of saccule of alligator, muchmagnified (after Schafer). c. c. columnar hair-cells; f,f, fiber cells; n, nerve-fiberlosing its medullary sheath and about to terminate in columnar auditory cells; h,auditory hair; h, base of auditory hairs split up into fibrils. Iii;. 410.—Diagrammatic representation of distribution of auditory nerve in membra-nous labyrinth and cochlea (after Huxley). HEARING. 565 •or to
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Coch. Fig. 410. Fio. 409. Fig. 409.—Auditory epithelium from macula acoustica of saccule of alligator, muchmagnified (after Schafer). c. c. columnar hair-cells; f,f, fiber cells; n, nerve-fiberlosing its medullary sheath and about to terminate in columnar auditory cells; h,auditory hair; h, base of auditory hairs split up into fibrils. Iii;. 410.—Diagrammatic representation of distribution of auditory nerve in membra-nous labyrinth and cochlea (after Huxley). HEARING. 565 •or to occlusion of the Eustachian tube from excess of secretion,cicatrices, etc., in consequence of which the relations of atmos-pheric pressure become altered, the membrana tympani beingindrawn, and the whole series of conditions on which the nor-mal transmission of vibrations depends disturbed, with thenatural result, partial deafness. The hardness of hearing- ex-perienced during a severe cold in the head (catarrh, etc.) isowing in great part to the occlusion of the Eustachian tube,which may be either partia
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