. Kirkes' handbook of physiology . E, stapes, 1, Body of incus, witharticular surface for head of malleus; 2, processus longus; 3, processus lenticularis; 4, articularsurface for incus; 5, head, (>, neck; 7, processus brevis; 8, manubrium, >.. body; to, short proc-ess; ii, long process; 12, processus longus; 13, head; 14, facet for incus; 15, manubrium, 16,head; 17, neck; 18, crus pnterius; 19, crus posterius; 20, foot plate. 61C Till: SENSES tympanic membrane, serving the same mechanical purpose as the vent-holein a snare or bass drum. The cavity of the tympanum communicates pos-teriorl
. Kirkes' handbook of physiology . E, stapes, 1, Body of incus, witharticular surface for head of malleus; 2, processus longus; 3, processus lenticularis; 4, articularsurface for incus; 5, head, (>, neck; 7, processus brevis; 8, manubrium, >.. body; to, short proc-ess; ii, long process; 12, processus longus; 13, head; 14, facet for incus; 15, manubrium, 16,head; 17, neck; 18, crus pnterius; 19, crus posterius; 20, foot plate. 61C Till: SENSES tympanic membrane, serving the same mechanical purpose as the vent-holein a snare or bass drum. The cavity of the tympanum communicates pos-teriorly with air cavities, the mastoid cells, in the mastoid process of the tem-poral bone; but its only opening to the external air is through the Eustachiantube. The cavity of the tympanum is lined with mucous membrane, the Recessus epitympanieusBody of incus Short process of incusLigament of incus Chorda tympani nervePyramid, with tendon of stapedius muscle ^ issuing from it Superforliganjent of malleusHead of malleus Foot of stapes. Anterior ligament of malleus Handle of malleus Tensor tympani muscle Processus cochlea riformisOsseous part ofEustachian tube Fig. 432.—Left Membrana Tympani and Chain of Tympanic Ossicles (Seen from InnerAspect). (Cunningham.) epithelium of which is ciliated and continuous with that of the pharynx. Itcontains a chain of small bones, ossicula anditus, which extends from themembrana tympani to the fenestra ovalis. The Membrana Tympani. The tympanic membrane is placed in a slant-ing direction at the bottom of the external canal, its plane being at an angleof about forty-five degrees with the lower wall of the canal. It is formedchiefly of a tough and tense fibrous membrane, the edges of which are setin a bony groove. Its outer surface is covered by a continuation of the epithe-lial lining of the auditory canal, its inner surface with part of the mucousmembrane of the middle ear. The Tympanic Ossicles. The ear bones, or ossicles, are named themalleus,
Size: 1838px × 1360px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1
