Examples. We could go on and on with great examples of theme, but we won't-I promise. Let's just look at three examples and analyze what gives depth and meaning to these pieces of literature. Take Golding's The Lord of the Flies, for example. We know that Golding taught in a boys' school and later fought in WWII.
The main artery splits into the left pulmonary artery and the right pulmonary artery, each of which directs the blood to the corresponding lung. Along with the umbilical arteries, these are the sole arteries in the body that transport oxygen-depleted blood. The umbilical arteries are located in the uterus.
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.