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From Embryology

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Cartilage of Right Auricula

Cranial surface of cartilage of right auricula.

The cartilage of the auricula (cartilago auriculæ; cartilage of the pinna) (Fig. 905, Fig. 906) consists of a single piece; it gives form to this part of the ear, and upon its surface are found the eminences and depressions above described. It is absent from the lobule; it is deficient, also, between the tragus and beginning of the helix, the gap being filled up by dense fibrous tissue. At the front part of the auricula, where the helix bends upward, is a small projection of cartilage, called the spina helicis, while in the lower part of the helix the cartilage is prolonged downward as a tail-like process, the cauda helicis; this is separated from the antihelix by a fissure, the fissura antitragohelicina. The cranial aspect of the cartilage exhibits a transverse furrow, the sulcus antihelicis transversus, which corresponds with the inferior crus of the antihelix and separates the eminentia conchæ from the eminentia triangularis. The eminentia conchæ is crossed by a vertical ridge (ponticulus), which gives attachment to the Auricularis posterior muscle. In the cartilage of the auricula are two fissures, one behind the crus helicis and another in the tragus.

(Text modified from Gray's 1918 Anatomy)


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Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.


Cite this page: Hill, M.A. (2024, June 13) Embryology Gray0905.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray0905.jpg

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current14:48, 4 June 2010Thumbnail for version as of 14:48, 4 June 2010430 × 275 (19 KB)S8600021 (talk | contribs)Category:Historic Embryology Category:Gray's 1918 Anatomy Category:Cartoon Category:Senses Category:Hearing