subdivision of epidermis skin appendage http://purl.org/sig/ont/fma/fma71012 https://en.wikipedia.org/wiki/Skin_appendage https://www.wikidata.org/wiki/Q1239288 Skin-associated structures that serve a particular function including sensation, contractility, lubrication and heat loss. In humans, some of the more common skin appendages are hairs (sensation, heat loss, filter for breathing, protection), arrector pilli (smooth muscles that pull hairs straight), sebaceous glands (secrete sebum onto hair follicle, which oils the hair), sweat glands (can secrete sweat with strong odour (apocrine) or with a faint odour (merocrine or eccrine)), and nails (protection). skin appendages