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.
Deoxygenated blood leaves the right ventricle (RV) of the heart via the pulmonary artery. The pulmonary artery divides into two main branches, the right pulmonary artery and the left pulmonary artery, which carry deoxygenated blood to the right and left lungs respectively. In both cases deoxygenated blood is taken to the alveolar capillaries of the lungs via networks of arteries and arterioles in each lung.