DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
The heart pumps oxygenated blood to the body and deoxygenated blood to the lungs. In the human heart there is one atrium and one ventricle for each circulation, and with both a systemic and a pulmonary circulation there are four chambers in total: left atrium, left ventricle, right atrium and right ventricle.
Your heart is a muscular organ that pumps blood to your body. Your heart is at the center of your circulatory system.This system consists of a network of blood vessels, such as arteries, veins, and capillaries. These blood vessels carry blood to and from all areas of your body.our heart is vital to your health and nearly everything that goes on in your body. Without the heart's pumping action, blood can't move throughout your body. Your blood carries the oxygen and nutrients that your organs need to work well.