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.
The systemic circulation is made up of the blood vessels that pump blood from the heart to the rest of the body. The pulmonary circulation is made up of the blood vessels that take deoxygenated blood from the right ventricle of the heart to the lung and then return oxygenated blood to the left atrium. The physiology of the systemic circulation is determined by: 1  Dynamics of blood flow.  Anatomy of circulatory system.