Assertion: epidermis's layer | /r/HasProperty | 20 to 30 cells layers
Facets:
Source sentences:
text: The outermost layer, the stratum corneum, is 20 to 30 cells layers thick but it accounts for about three-quarters of epidermal thickness; it rubs and flakes off slowly and steadily as the dandruff familiar to everyone; then, this layer is replaced by cells produced by the division of the deeper stratum basale cells.