. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 175.—Free nerve termina- tions in the skin of Salamandra, freely after Retzius. FIG. 176.—Sensory cells, after Ftirbringer. a, crista cell of ear; b, rod cell of eye; c, ol- factory cell. The recipient structures may be of two kinds. In the one (fig. 175) the ends of the nerve receive the impressions from without, often aided by various accessory structures. In the other there are specialized sense cells (fig. 176), the peripheral ends of which bear different kinds of cuticular percipient parts—hairs, bris
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 175.—Free nerve termina- tions in the skin of Salamandra, freely after Retzius. FIG. 176.—Sensory cells, after Ftirbringer. a, crista cell of ear; b, rod cell of eye; c, ol- factory cell. The recipient structures may be of two kinds. In the one (fig. 175) the ends of the nerve receive the impressions from without, often aided by various accessory structures. In the other there are specialized sense cells (fig. 176), the peripheral ends of which bear different kinds of cuticular percipient parts—hairs, bristles, rods, cones, etc.—while the basal ends of the cells are connected with the terminations of nerve cells which act as the conducting elements. The distinction between the two is one of convenience rather than one of physiological or mor- phological importance, for the 'nerves' of the first are in reality but the prolongations of sensory cells. Nerve-end Apparatus. In many cases—skin, alimentary tract, muscles, etc.—the ends of the sensory nerves lose their medullary sheath and break up into fine fibrillse which terminate, without special accessory structures, among the cells of the tissue to which they are distributed (free nerve termina- tions). On the other hand, there are numerous end organs, espe-. 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 Kingsley, J. S. (John Sterling), 1854-1929. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
