Farbgrafik Lunge
CC BY Patrick J. Lynch, medical illustrator 2.5)
http://creativecommons.org/licenses/by/2.5/deed.de
Farbanimation Atmung
CC BY John Pierce 3.0
http://creativecommons.org/licenses/by/3.0/deed.en
Farbgrafik Lunge
CC BY Patrick J. Lynch, medical illustrator 2.5)
http://creativecommons.org/licenses/by/2.5/deed.de
Farbanimation Atmung
CC BY John Pierce 3.0
http://creativecommons.org/licenses/by/3.0/deed.en
Farbfoto: Brennende Kerze
CC BY Windgeist 2.0
http://creativecommons.org/licenses/by-sa/3.0/deed.en