Deutsch: Haar / Español: Pelo / Português: Pelo / Français: Pilositê humaine / Italiano: Capelli
Hair is a filamentous biomaterial that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.
Deutsch: Klimaanlage / Español: Climatización / Português: AVAC / Français: Chauffage, ventilation et climatisation / Italiano: HVAC
HVAC (heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer.