File:Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct - for the use of schools and colleges (1870) (14595975700).jpg

Identifier: outlinesofcompar00agas (find matches)
Title: Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges
Year: 1870 (1870s)
Authors: Agassiz, Louis, 1807-1873 Gould, Augustus A. (Augustus Addison), 1805-1866 Wright, Thomas, 1809-1884
Subjects: Physiology, Comparative Zoology
Publisher: London : Bell & Daldy
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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from which it is separated by a bony partition, and per-forated by two small holes, called, from their form, the roundand the oval apertures, the foramen rciundum and the fora-men ovale,/.(fig. 45).The firstis closedby a mem-brane simi-lar to thatof the tym-panum,while thelatter is closed by the stapes. % ^0.—Relative situation of the Tympanum and Labyrinth. (The relative position of the tympanum and labyrinth isshown in figure 50. (1), is the tympanum, with its tubes
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74 SPECIAL SENSES. and bony chain; (1 1), A, the labyrinth, in which the nervousexpansion floats; B, the semicircular canals; andC, the cochlea.The labyrinth is the true auditory organ, and is more or lessdeveloped wherever audition exists as a special sense. Com-parative anatomy shows many phases of structure in thisintricate apparatus. (§ 151. The labyrinth is situated (fig. 45) I, m, in the mostsolid portion of the temporal bone : it consists of three portions(fig. 51); the vestibule (a) ; the semicircular canals (5) ; andthe cochlea (c). Fig. 51.—Views of Labyrinth.

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