. The elements of embryology . Embryology. xir.] THE NASAL ORGAN. 399 to the fenestra ovalis. These ossicles, which arise maialy from the mandibular and hyoid arches (m'de p. 403), are at first imbedded in the connective tissue in the neighbourhood of the tympanic cavity, but on the full development of this cavity, become appareptly placed within it, though really enveloped in the mucous membrane lining it. Nasal organ. In Mammalia the general formation of the anterior and posterior nares is the same as in Birds; but an outgrowth from the inner side of the canal between the two openings arises
. The elements of embryology . Embryology. xir.] THE NASAL ORGAN. 399 to the fenestra ovalis. These ossicles, which arise maialy from the mandibular and hyoid arches (m'de p. 403), are at first imbedded in the connective tissue in the neighbourhood of the tympanic cavity, but on the full development of this cavity, become appareptly placed within it, though really enveloped in the mucous membrane lining it. Nasal organ. In Mammalia the general formation of the anterior and posterior nares is the same as in Birds; but an outgrowth from the inner side of the canal between the two openings arises at an early period; and becoming separate from the posterior nares and provided with a special opening into the mouth, forms the organ of Jacobson. The general relations of this organ when fully formed are shewn in Fig. 133. Fio. Section through the Nasal Cavitt and Jacobson's Organ. (From Gegenbaur.) sn. septum nasi; en. nasal cavity; J. Jacobson's organ ; d. edge of upper 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 Foster, M. (Michael), Sir, 1836-1907; Balfour, Francis M. (Francis Maitland), 1851-1882; Sedgwick, Adam, 1854-1913; Heape, Walter, 1855-1929. London ; New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, bookpubli, booksubjectembryology
