what does the lungs do
The lungs provide a surface for gas exchange in mammals. Inside the lungs are the alveoli, in which oxygen dissolves into the blood. Is is basically a gas exchange. The lungs filter the heart with fresh oxygen and get it in the blood and pumped into the rest of the body until you breath out, which makes carbon dioxide!his is called the pulmonary circulation. From your pulmonic valve, blood travels to the pulmonary artery to tiny capillary vessels in the lungs. Here, oxygen travels from the tiny air sacs in the lungs, through the walls of the capillaries, into the blood.