Pulmonary circuit
Diagram of pulmonary circulation. Oxygen-rich blood is shown in red; oxygen-depleted blood in blue.
This diagram of the pulmonary arteries labels the right and left pulmonary arteries, right and left pulmonary veins, right and left atria, right and left ventricles, and heart muscle.
Source
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"Illu pulmonary circuit."
http://en.wikipedia.org/wiki/File:Illu_pulmonary_circuit.jpg
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