File:Anson1948 fig10.jpg
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Fig. 10. Otic capsule developmental stages 160 mm fetus
Drawings, continued; same specimen (160 mm) as in figure 9 (Land 2). X 7; (a) at the same level as figure 91;, viewed from a more lateral position, in order to reveal the number and size of the foramens present in the periosteal plate on the obturator surface of the base and on the basal extremities of the crura; (b) .a more inferior segment of the stapes and of the otic capsule (viewed as are 9 a and 19), showing cavities produced in the calcifying cartilage preceding the stage of complete excavation of the base. Here, and in figure 9 a and b, the osseous shell externally and the calcifying cartilage internally merge imperceptibly in a transitional zone. In I) of figure 10 the hummocks exposed in the basal portion of the stapes are composed chiefly of calcified cartilage; their summits are capped by either endochondral or intrachondrial bone.
Reference
Anson BJ. and Cauldwell EW. Stapes, fissula ante fenestram and associated structures in man: V . From the fetus of 160 mm to term. (1948) 48(3): 263-300.
Cite this page: Hill, M.A. (2024, April 24) Embryology Anson1948 fig10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Anson1948_fig10.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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