Studies in Anatomy, Volume 3

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Page 9 - ... (1) That the middle ear is simply a cleft which intervenes between the periotic capsule and the squamo-zygomatic and tympanic elements of the temporal bone. The cleft is primarily continuous, and however much it may be altered in shape and modified in parts to form the cavities of the Eustachian tube, the tympanum, and the mastoid antrum, that continuity is never lost. (2) That the mastoid air-cells develop at a much earlier period than is usually supposed. With these facts in mind it occurred...

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