Figure 4: Hair follicles in the dermis of an adult four-striped mouse. Photomicrograph of multiple hair follicles (a) and electron micrograph of a single hair follicle (b). hs: hair shaft; ors: outer root sheath; s: sebaceous gland. (a) is Toluidine blue staining and scale bar = 2.5 µm. (b) is an electron micrograph and with scale bar = 0.33 µm.