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.
In a healthy heart, oxygen-rich blood moves from your lungs to the left upper chamber of your heart. The upper chambers are called your atria. Your atria pump the blood into the two lower chambers of your heart, known as your ventricles. Blood from your lungs is pumped from the left atrium into the left ventricle. The left ventricle pumps your blood around your body and back to the right atrium, the right ventricle, and then your lungs.