The exodus was a journey that moses had lead his people out of. To the Hebrews the release from slavery proved that God was protecting and watching over them.
The left and right ventricles are stronger pumps. The left ventricle is the strongest because it has to pump blood out to the entire body. When your heart functions normally, all four chambers work together in a continuous and coordinated effort to keep oxygen-rich blood circulating throughout your body.
The heart has four chambers that keep oxygen-depleted blood from mixing with oxygen-rich blood. The upper chambers, which receive blood, are called the right atrium and the left atrium. The lower chambers, which pump blood out of the heart, are called the right ventricle and the left ventricle.