Chambers's encyclopædia; a dictionary of universal knowledge . Fig. section of bulb of a .«mall black human , basement membrane of tlie follicle ; b, layei- of epidermiccells resting upon it; c, layer of imbricated cells, formingUie outer lamina, or cortex, of the hair; d, more bulky cellscontainiiif: piiiment; e, a mass of cells in the axis of the hair,loaded with pigment. deep cells, and the scaly character of the moresupcj-ticial ones, which are here in contact ^vith theoutside of the hair (c). The hair grows from thebottom of the follicle, and the cells of the deepeststr
Chambers's encyclopædia; a dictionary of universal knowledge . Fig. section of bulb of a .«mall black human , basement membrane of tlie follicle ; b, layei- of epidermiccells resting upon it; c, layer of imbricated cells, formingUie outer lamina, or cortex, of the hair; d, more bulky cellscontainiiif: piiiment; e, a mass of cells in the axis of the hair,loaded with pigment. deep cells, and the scaly character of the moresupcj-ticial ones, which are here in contact ^vith theoutside of the hair (c). The hair grows from thebottom of the follicle, and the cells of the deepeststratum gradually enlarge as they mount in the softbulb of the hair, which owes its size to this circum-stance. If the hair is to be coloured, the pigmentcells are also here developed. It frequently happensthat the cells in the axis of the bulb become loadedwith jtigment at one period, and not at another, sothat, as they pass upwards in the shaft, a darkcentral tract is i)roduced, of greater or less lengd;h,and the hair appears here and there to be tubular (e)
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1868
