. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE MIDDLE EAR 441 the extremity of the cartilage which forms the styloid process of the adult, a narrow plate of cartilage which forms an investment for the facial nerve (Fig. 262, VII), and dorsal to this a ring of cartilage (st) which surrounds a small stapedial artery and represents the stapes. It has been found that in the rabbit the mass of cells from which the stapes is formed is at its first appearance quite independent of the second branchial arch (Fuchs), and it has been held to be
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE MIDDLE EAR 441 the extremity of the cartilage which forms the styloid process of the adult, a narrow plate of cartilage which forms an investment for the facial nerve (Fig. 262, VII), and dorsal to this a ring of cartilage (st) which surrounds a small stapedial artery and represents the stapes. It has been found that in the rabbit the mass of cells from which the stapes is formed is at its first appearance quite independent of the second branchial arch (Fuchs), and it has been held to be a. Fig. 262.—Semi-diagrammatic Viewof the Auditory Ossicles of an Embryo of Six Weeks. i, Incus; j, jugular vein; m, malleus; mc, Meckel's cartilage; oc, capsule of otocyst; R, cartilage of the second branchial arch; st, stapes; VII, facial nerve.—(Siebenmann.) derivative of the mesenchyme from which the periotic capsule is formed. In later stages, however, it becomes connected with the cartilage of the second branchial arch, as shown in Fig. 262, and it is a question whether this connection, which is transitory, does not really indicate the phylogenetic origin of the ossicle from the second arch cartilage, its appearance as an independent structure being a secondary ontogenetic phenomenon. However that may be, the stapedial artery disappears in later stages and the stapedius. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
