Assertion: sebaceous gland's duct | /r/MadeOf | keratin
Facets:
Source sentences:
text: Sebaceous ductal adenomas consist of a large numbers of variably sized ducts which contain keratin (a tough, insoluble protein substance that is the chief structural constituent of hair, nails) and some sebum.
text: Sebaceous ductal adenomas consist of a large numbers of variably sized ducts which contain keratin (a tough, insoluble protein substance that is the chief structural constituent of hair, nails) and some sebum.