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.
Heart. The heart is a muscular organ in your chest, which controls the movement of blood in your cardiovascular system. Acting as a pump, it rhythmically moves all the blood in your body where it needs to go, through networks of blood vessels that branch out to and from all parts of your body.hoto Credit janulla/iStock/Getty Images. Your cardiovascular system is made up of the heart, blood vessels and blood. It is a system that never rests. It pumps 5 to 6 liters of blood per minute through your body and can pump as many as 30 liters per minute during times of extreme stress.