. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 36 SMELL, TASTE, ALLIED SENSES nasal epithelium must be their cells of origin, as in fact was shown to be the case for the chick by Disse (1896a, 1897). Here the olfactory nerve-fibers have been demon- strated to grow from certain olfactory epithelial cells into the olfactory bulb, the epithelial cells acting in all respects like neuroblasts Bedford (1904). The trigeminal fibers. Flo. 10.—Olfactory epithelium of an embryo chick (ninth day) showinR olfactory cells, cells, and free-nerve endi
. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 36 SMELL, TASTE, ALLIED SENSES nasal epithelium must be their cells of origin, as in fact was shown to be the case for the chick by Disse (1896a, 1897). Here the olfactory nerve-fibers have been demon- strated to grow from certain olfactory epithelial cells into the olfactory bulb, the epithelial cells acting in all respects like neuroblasts Bedford (1904). The trigeminal fibers. Flo. 10.—Olfactory epithelium of an embryo chick (ninth day) showinR olfactory cells, cells, and free-nerve endings of fibers from ganglion cells of the trigeminal nerve. After Rubaschkin, 1903, Fig. 3. must on the other hand grow from trigeminal ganglion cells into the olfactory epithelium there to terminate as free-nerve endings, but of this there is at present no di- rect evidence. 9. Comparative Anatomy of Olfactory Organs. The nasal organs in the lower vertebrates are very different from those in man. In Amphioxus a single sensory pit slightly to the left of the median dorsal line of the head and connected with the anterior end of the nerve-tube is assumed to be an olfactory organ. If this is so, it is prob- able that this pit corresponds to the single median olfac-. 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 Parker, George Howard, 1864-1955. Philadelphia ; London : J. B. Lippincott Company
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsensesa, bookyear1922
