Assertion: skin's gland | /r/CapableOf | secrete oily semi-fluid natural sebum
Facets:
Source sentences:
text: Medical anthropologist John Heinerman, in his book, Heinerman’s Encyclopedia of Healing Juices, mentions that when avocado is regularly consumed, the sebaceous glands secrete the oily semi-fluid natural sebum that keeps the skin hydrated and also helps the muscles and joints stay agile.