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.
The pulmonary trunk is a blood vessel which divides to form the right and left pulmonary arteries.At the base of this trunk is a pulmonary semilunar valve that is made up of three leaflets or cusps.he pulmonary trunk is a blood vessel which divides to form the right and left pulmonary arteries.