From Embryology

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


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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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)
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.


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 13) Embryology Hertwig282.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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