. Elements of histology. Histology. Sa'/x. 415 of a greater or lesser dark is oliieHy ditlVise pigment, neither the one nor the other pigment is present: in grey there is air at least in the superficial layers of the hair substance, besides absence of pigment. Sleek hairs are circular, curly oval, in cross-section. Sleek hairs are implanted with their h a i r - b u 1 b straight ; in curly hairs the hair-bulb forms a more or less pronounced hook. This is the cause for the more or less si)iral twisting of the hair-shaft of curly hairs during its growth outwards. 387. Xew formation of liair (Fig.
. Elements of histology. Histology. Sa'/x. 415 of a greater or lesser dark is oliieHy ditlVise pigment, neither the one nor the other pigment is present: in grey there is air at least in the superficial layers of the hair substance, besides absence of pigment. Sleek hairs are circular, curly oval, in cross-section. Sleek hairs are implanted with their h a i r - b u 1 b straight ; in curly hairs the hair-bulb forms a more or less pronounced hook. This is the cause for the more or less si)iral twisting of the hair-shaft of curly hairs during its growth outwards. 387. Xew formation of liair (Fig. 257).— Every hair, be it fine and short or thick and long, \mder normal conditions, has only a limited exist- ence, for its hair-follicle, including the papilla, sooner or later undergoes degener- ation, and subsequent to this a new papilla and a new hair are formed in its place. What happens is this—the lower part of the hair-follicle, including the papilla and hair-bulb, de- generate and are gradu- ally absoi'bed. Then there tint, in red luiirs there In white or albino hairs fe''i'l't.:->.? -^. 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 Klein, E. (Edward), 1844-1925; Edkins, John Sydney, b. 1865. Philadelphia : Lea Brothers
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphialeabro
