What is the Pulmonary Artery?

The pulmonary artery is the source of blood from the heart to the lungs. It along with the umbilical cord are the only two units that carry blood that has been deoxygenated. The pulmonary artery starts at the bottom of the heart right around the right ventricle, and when it gets to the top of the heart it actually turns into two arteries and takes blood to the left or right lung.