How does blood become pure in lungs?

Lungs contain numerous air sacs. These air sacs are summoned by blood capillaries. Durring breathing, oxygen is collected in air sacs. When blood having hemoglobin passes through blood capillaries then it gets sufficient oxygen and becomes oxyhemoglobin. At this condition, carbondioxide present in blood is left over there. Hence, blood becomes pure. 

The lungs filter carbon dioxide from your body when you breathe out. Liver – your liver is the organ below the lungs that acts like a filter for the blood. Chemicals and impurities, including from drugs and medications, are filtered by the liver. The liver have many other essential functions.Cleansing your blood is a good way to naturally clear out toxins from the body and maintain optimum health. Blood carries oxygen and nutrition to your body's cell and removes waste and other pollutants. Purifying your blood is crucial to keep your body work properly and keep diseases at bay.