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 ventricles are the pumping chambers'. The atria are the receiving chambers of the heart. The ventricles, the right ventricle pumps blood to the lungs through the pulmonary artery (the only artery that carries deoxygenated blood). The left ventricle pumps blood to the rest of the body through the Aorta.