Systemic circulation carries oxygenated blood from the left ventricle, through the arteries of the body to the capillaries in the tissues. This is how blood reaches all areas of the body.
Coronary circulation describes the circulation of blood in the vessels that supply the heart. Coronary arteries supply oxygenated blood to the heart muscle, and cardiac veins carry the deoxygenated blood away from the heart.
Pulmonary circulation carries deoxygenated blood away from the right ventricle of the heart to the lungs, where it becomes oxygenated. Then, it returns the oxygenated blood from the lungs to the left atrium and ventricle of the heart.
