Assertion: dermis's cell | /r/CapableOf | produce keratin
Facets:
Source sentences:
text: Ninety percent of the epidermis, including the outer layers, contains keratinocytes--cells that produce keratin, a protein that helps waterproof and protect the skin.
text: As cells multiply and make keratin to harden the structure, they're pushed up the follicle and through the skin's surface as a shaft of hair.
text: New cells (keratinocytes, which produce keratin) are formed in the bottom layer and make their way up to the top layer, where they are shed.
text: The major cell of the epidermis is the keratinocyte, which produces keratin, a fibrous protein that aids in skin protection.