Although there are many ingredients used to make glue, most formulas contain something called polymers. A polymer is a large molecule that often is described as being a long molecular strand, much like spaghetti.
The pulmonary artery carries deoxygenated blood from the heart to the lungs. It is one of the only arteries (other than the umbilical arteries in the fetus) that carries deoxygenated blood.
Pulmonary arteries carry blood from the heart to the lungs. According to About.com, the primary pulmonary artery branches off the right ventricle of the heart before further branching into right and left pulmonary arteries on the way to the lungs. The right pulmonary artery is the longer of the two.