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Fig. 282. Diagrammatic representation of the whole organ of hearing in Man

from WIEDKKSHEIM.

Outer ear: M, M, auricle; Mae, meatus auditorius externus ; 0, its wall; Mt, membrana tympani. Middle car: Ct, Ct, cavum tympani ; O' , its wall; SAp, sound-conducting apparatus, which i.s drawn as a simple rod-like body in place of the auditory ossicles ; the place f corresponds to the stapedial plate, which closes the fenestra ovalis ; Tb, tuba Eustachii ; Tb 1 , its opening- into the pharynx; 0", its wall. Inner car: the bony labyrinth (KL, KL') for the most part cut away ; S, sacculus ; a, b, the two vertical membranous and osseous semicircular canals ; S.e, D.e, saccus and ductus endolymphaticus, of which the latter is divided at 2 into two arms ; Cp, cavum perilyinphaticum ; Cr, canalis reunions

Con, membranous cochlea, which produces at + the vestibular cceciun ; Con 1 , bony cochlea ; Sv and St, scala vestibuli and scala tympini, which at * communicate with each other at the cupula tenninalis (Ct) ; D.p, ductus perilymphaticus, which arises from the scala tympani at (I and opens out at D.p' . The horizontal semicircular canal is not specially designated, but is easily recognisable.

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Textbook Contents
Text-Book of the Embryology of Man and Mammals: Description of the Sexual Products \| The Phenomena of the Maturation of the Egg and the Process of Fertilisation \| The Process of Cleavage \| General Discussion of the Principles of Development \| The Development of the Two Primary Germ-Layers \| The Development of the Two Middle Germ-Layers \| History of the Germ-Layer Theory \| Development of the Primitive Segments \| Development of Connective Substance and Blood \| Establishment of the External Form of the Body \| The Foetal Membranes of Reptiles and Birds \| The Foetal Membranes of Mammals \| The Foetal Membranes of Man \| The Organs of the Inner Germ-Layer - The Alimentary Tube with its Appended Organs \| The Organs of the Outer Germ-Layer \| The Development of the Nervous System \| The Development of the Sensory Organs \| The Development of the Skin and its Accessory Organs \| The Organs of the Intermediate Layer or Mesenchyme \| The Development of the Blood-vessel System \| The Development of the Skeleton --Mark Hill 21:14, 10 May 2011 (EST) This historic embryology textbook is at only an "embryonic" editing stage with many typographical errors and no figures.

Reference

Hertwig O. Text-book of the embryology of man and mammals. (1892) Translated 1901 by Mark EL. from 3rd German Edition. S. Sonnenschein, London.

Cite this page: Hill, M.A. (2024, April 26) Embryology Hertwig282.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertwig282.jpg

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