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.
Path of Blood Through the Heart. 1  The path of blood through the heart begins with the right atrium receiving blood, which has circulated through most of the body. 2  This blood is also relatively high in carbon dioxide, which is a product of metabolism in the tissues.