Farbgrafik
1: Blutfluss, 2: Klappe. Querschnittsdiagramm einer Vene mit Klappen.
(CC BY-derivative work: Mouagip (talk) SA 3.0
Farbgrafik
CC BY-A-kreislauf01.jpg: Jörg Rittmeister
derivative work: Vezixig
SA 2.5
http://creativecommons.org/licenses/by-sa/2.5/deed.de
Schwarz-weiß-Foto
Microvessel showing an erythrocyte (E), a tunica intima of endothelial cells and a tunica adventitia of pericytes.
(CC BY Robert M. Hunt 3.0
Farbfoto
CC BY Crystal (Crystl) from Bloomington, USA 2.0
http://creativecommons.org/licenses/by/2.0/deed.en
Farbgrafik
This slide shows the arterial and venous blood circulation of the pulmonary system.
CC BY Artwork by Holly Fischer
3.0
http://creativecommons.org/licenses/by/3.0/deed.de