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.
Coronary Circulation. The coronary circulation is the process by which the oxygenated blood is supplied and deoxygenated blood is collected from the heart muscles. Even though the four chambers of the heart are filled with blood, the myocardium or muscle tissue of the heartis so thick that blood cannot diffuse into them easily.