. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. Fig. 402.—I. The Mechanics of the Auditory , after Hslm- holtz. II. Section of the Middle Ear, after Hensen. (Mutik.) I. a, malleus; ft, incus: mn. long process of incus ; *, stapes; the arrows show the direction of mo- tion. II. G. external auditory canal; , meuibrana tympani; (', tympanum ; B, malleus ; , superior ligamant; S, stapes. Stretching across the-middle ear from one side to the other is the chain of bones, each named from its resemblance to some instrument; thus, the malleus, so
. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. Fig. 402.—I. The Mechanics of the Auditory , after Hslm- holtz. II. Section of the Middle Ear, after Hensen. (Mutik.) I. a, malleus; ft, incus: mn. long process of incus ; *, stapes; the arrows show the direction of mo- tion. II. G. external auditory canal; , meuibrana tympani; (', tympanum ; B, malleus ; , superior ligamant; S, stapes. Stretching across the-middle ear from one side to the other is the chain of bones, each named from its resemblance to some instrument; thus, the malleus, so-called from its resemblance to a hammer, is attached to the membravmm of the tympanum by its handle (Fig. 402). The second bone, from its resemblance to an anvil, is called the incus, and is attached on the one side to the malleus and on the other to the stapes or stirrup-bone, which is connected by its base to the membrane of the fenestra ovalis, which opens into the internal ear. All these ossicles are movable on each other, but they have no lateral connection with any structure. Sometimes at the end of the incus is found a separate bone known as the os orbiculare. In the inner boundary of the middle ear is placed, in addition to the oval window, a second, also communicating with the vestibule, and called the fenestra rotunda, or round window. The internal ear, or labyrinth, is composed of bone, and consists of. Fig. 403.—External Appearance of the Labyrinth and Fe- nestra Ovalis. (Landois.) /upper, ft horizontal, and s posterior semi- circular canals of the left side. The cochlea is seeu to the left of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Robert Meade, 1854-. Chicago, A. Eger
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