What are the two circuits by which the gases are circulated in and out of the lungs?

Question: What are the two circuits by which the gases are circulated in and out of the lungs?

Two circuits is (1) pulmonary and (2) systemic circuit both are different from each other but link each other (1) pulmonary circuit transport blood  to and from the lungs where it is pick up oxygen and deliver carbon dioxide from exhalation (2) systemic circulation most blood between the heart and the rest of the body its and oxygenated blood out the cells and return the oxygenated blood in the heart the heart power both type of circulation.