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.
Blood flow to tissues (perfusion) â Rapidly perfused tissues, such as the heart, liver, kidney, brain, and lung, are exposed to the drug in. the first few minutes following absorption (initial. phase of drug distribution).