Also see user session. In telecommunication, a session is a series of interactions between two communication end points that occur during the span of a single connection.
The path of blood through the heart begins with the right atrium receiving blood, which has circulated through most of the body. This blood is relatively low in oxygen because most of it has already been delivered to different organs and tissues.
the pathway of blood to and from the heart 1 blood that has circulated through the body which has lost its oxygen and collected carbon dioxide enters through the vena cava into the right atrium of the heart 2 the right atrium contracts and pumps the blood through the tricuspid valve and into the right ventricle 3 the right ventricle then pumps blood through the pulmonary artery into the lungs 4 in the lungs tiny blood vessels called capillaries absorb carbon diox ide from the blood and replace it with oxygen 5 oxygenated blood then flows through the pulmonary vein and into the left atrium 6 oxygenated blood then pumps through the mitral valve and into the left ventricle