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 â deoxygenated blood is pumped by the right ventricle into the pulmonary arteries that link to the lungs. pulmonary veins â the pulmonary veins return oxygenated blood from the lungs to the left atrium of the heart. aorta â this is the largest artery of the body, and it runs the length of the trunk.