A manual of otology for students and practitioners . Int. carat, a Membrana / • tympani / Cartilage of the meatus Fig. 2.—Horizontal section of the external auditory meatus and tym-panum. (Gray.). FENESTRA OVALISLOSED BY STAPES Fig. 3.—Vertical section of the external auditory meatus and tympanum. (Gerrish.) EXTERNAL EAR 21 posteriorly (Figs. 2 and 3). The osseous canal is formedprincipally by the outgrowth of the tympanic ring. Atbirth this ring forms an incomplete circle (Fig. 4). Thepart between the ends of the ring is called the segmentof Rivinus, and is filled in by the squam
A manual of otology for students and practitioners . Int. carat, a Membrana / • tympani / Cartilage of the meatus Fig. 2.—Horizontal section of the external auditory meatus and tym-panum. (Gray.). FENESTRA OVALISLOSED BY STAPES Fig. 3.—Vertical section of the external auditory meatus and tympanum. (Gerrish.) EXTERNAL EAR 21 posteriorly (Figs. 2 and 3). The osseous canal is formedprincipally by the outgrowth of the tympanic ring. Atbirth this ring forms an incomplete circle (Fig. 4). Thepart between the ends of the ring is called the segmentof Rivinus, and is filled in by the squamous portion ofthe temporal bone. In the development of the bone thisgrows pari passu with the outgrowth from the tympanicring and completes the canal above. This takes place 1 forsquamousporfion,includingzygoma :Sd month. 1 for ti/mpanicplate. 6 for petrous and mastoid portions. 2 for styloid process. Fig. 4.—Tympanic ring. (Gray.)
Size: 1374px × 1818px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectear, bookyear1916
