Farbfoto
CC BY Colin Davis from Chicago, United States. 2.0
http://creativecommons.org/licenses/by/2.0/deed.en
Farbfoto eines Exponats
Venengeflechte am Wirbelkanal, Wachsmodell, Paris, um 1900
CC BY User:Mattes 2.0 DE
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Farbgrafik
CC BY-A-kreislauf01.jpg: Jörg Rittmeister
derivative work: Vezixig
SA 2.5
http://creativecommons.org/licenses/by-sa/2.5/deed.de
Farbgrafik
1: Blutfluss, 2: Klappe. Querschnittsdiagramm einer Vene mit Klappen.
(CC BY-derivative work: Mouagip (talk) SA 3.0
http://creativecommons.org/licenses/by-sa/3.0/deed.en