. The Cambridge natural history. Zoology. HAIR reduced to as few as two bristles on the lips. The term " hair," however, is apt to be somewhat loosely applied; it has been made use of to describe, for example, the slender processes of the SrT,. 1.—A, Sectiou of liuniaii skin. Co, Dermis ; Z), sebaceous glands ; /', fat in dermis ; G^ vessels in dermis ; GP, vascular papillae ; H, hair ; N, nerves in dermis ; NP^ nervous papillae ; Sc, horny layer of epidermis ; SD, sweat gland; .S'Z)\ duct of sweat gland ; -SJ/, Malpighian layer. B, Longitudinal sec- tion through a hair (diagrammatic
. The Cambridge natural history. Zoology. HAIR reduced to as few as two bristles on the lips. The term " hair," however, is apt to be somewhat loosely applied; it has been made use of to describe, for example, the slender processes of the SrT,. 1.—A, Sectiou of liuniaii skin. Co, Dermis ; Z), sebaceous glands ; /', fat in dermis ; G^ vessels in dermis ; GP, vascular papillae ; H, hair ; N, nerves in dermis ; NP^ nervous papillae ; Sc, horny layer of epidermis ; SD, sweat gland; .S'Z)\ duct of sweat gland ; -SJ/, Malpighian layer. B, Longitudinal sec- tion through a hair (diagrammatic).' Aji, Band of muscular fibres inserted into tin,' hair-follicle ; C'o^ corium (dermis) ; F, external longitudinal ; 7'"^ internal cir- cular, fibrous layer of follicle; Ft, fatty tissue in the dermis ; GH, hyaline membrane between the root-sheath and the follicle ; HBD, sebaceous gland ; i/P, hair-papilla with vessels in its in- terior ; My medullary substance (pith) of the hair ; 0, cuticle of root-sheath ; R. cortical layer ; Sc, horny layer of epidermis ; Sch, Hair shaft ; SM, Mal- pighian layer of epidermis ; WS, WS^, outer and inner layers of root-sheath. Anatomy.) B (From Wiedersheim's Comparative chitinous skin of the Crustacea. It will be necessary, therefore, to enter into the microscopical structure and development of the mammalian hair. Hair is found in every mammal. The first appearance of a hair is a slight thickening of the stratum Malpighii of the epidermis, the cells taking part in this being. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
