Histology and Ultrastructure of Transitional Changes in Skin Morphology in the Juvenile and Adult Four-Striped Mouse (Rhabdomys pumilio)
Electron micrographs of hair follicles from young adult four-striped mouse skin. (a) and (b) correspond to Figures 5(a) and 5(b) at the hair bulb and suprabulbar levels. Trichohyalin granules (arrows) are seen in the Huxley and Henle layers. (c) is at the suprabulbar level showing an accumulation of cells in Huxley’s layer in the superior aspect of the follicle and corresponds to Figure 5(c). (d) is a section slightly higher than suprabulbar level and corresponds to Figure 5(d). Henle’s layer and the inner root sheath are keratinised. (e) is a section of hair follicle layers at the superficial hypodermis to basal dermis and corresponds to Figure 5(e). The inner root sheath is fully keratinised in (f) above the level of the sebaceous gland and corresponds to Figure 5(f). Bm: basement membrane; C: collagen fibres; Cc: cuticle of cortex; Ci: cuticle of inner root sheath; Co: cornified cellular layer; Cp: companion layer; CTF: connective tissue follicle; Cx: cortex; DP: dermal papilla; He: Henle Layer; Hx: Huxley layer; ORS: outer root sheath; Line; hair matrix; Asterisk; area of missing hair shaft. Scale bar: (a) and (d), 0.5 µm; (b) and (c), 0.33 µm, (e), 0.25 µm and (f), 0.20 µm.
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