Sebaceous glands help the skin stay moist and protect it against external influences such as harsh weather, pollution, and microbial assaults: The oily or waxy matter that these microscopic, exocrine glands secrete – called sebum – lubricates and softens the skin and hair.
from 3ders.org - http://www.3ders.org
viernes, 12 de enero de 2018
8:16
MR: EDITOR
John
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