1 To find what your carâs fuel economy is (Metric System), multiply the amount of fuel used by 100 and divide that by the total kilometres driven. 2  Example: 42 litres x 100 / 400 = 10.5 litres / 100km.
There are four chambers of the heart: a right atrium, a right ventricle, a left atrium and a left ventricle. First, deoxygenated blood (blood without oxygen) is carried from the body through the Inferior and Superior Vena Cava. From these vessels, the blood is dumped into the Right Atrium of the heart.
The venae cavae empties the deoxygenated blood into the right atrium of the heart. The venae cavae has two divisions. The superior vena cava resembles a drain that leads down into the heart. Its job is to return deoxygenated blood to the heart from the head and arms. The inferior vena cava has a bigger area to drain, and its job is to return deoxygenated blood to the heart from all body regions below the diaphragm.