Question

double circuit circulation flow chart

Answer 1

oxygenated bloodvflows from lungs to L.atrium then R.atrium to L.ventricle L.ventricle to body parts.
body parts to R.atrium R.atrium to R.ventricle,R.ventricle to lungs.
these both together known as double circulation. hope this helps u.

Answer 2

You might be familiar with the circulation of blood. Now look at this image, this image is a schematic representation of blood circulation.

Here you can observe that the blood passes through the heart twice. Since the blood goes twice through the heart, it is known as double circulation. Warm-blooded animals like mammals have this type of blood circulation.