In which vessels of the small circle does arterial flow, and in which – venous blood?

Venous blood flows in the pulmonary arteries (from the right ventricle to the lungs). Entering the lungs, they branch into arterioles of a smaller diameter up to the capillaries. Passing through the capillaries of the lungs, the blood is saturated with oxygen (turns into arterial). Then, through the pulmonary veins, arterial blood enters the left atrium and ventricle.

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