Assertion: woolly mammoth's gland | /r/CapableOf | secrete sebum,‭ ‬an oily substance
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Source sentences:
text: the adaptations went even further as the skin itself had sebaceous glands that would have secreted sebum,‭ ‬an oily substance primarily composed of dead fat cells into the hair.‭ ‬Sebum has a number of functions that help maintain skin and hair integrity,‭