Table 2.

Characteristics of skins of different species (modified from Liu et al., 2009 [32]).

	Mouse	Rat	Porcine	Human
Skin thickness	0.4–1 mm	1–2 mm	1.5–2 mm	2–3 mm
Epidermal thickness	9.4–13.3 µm	21.7 µm	52–100 µm	50–100 µm
Stratum corneum	2.9 µm	5 µm	12.28 µm	10–12.5 µm
Fixed skin	no	no	Yes	Yes
Hair follicles	658 hairs/cm2	289 hairs/cm2	11 hairs/cm2	11 hairs/cm2
Sources	laboratory animals	laboratory animals	veterinary education, food industry	cadaver, tissue bank, biopsy