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.
This pathway is initiated within the blood itself or the exposure of the blood to collagen of damaged vascular wall. (2) (cell biology) One of the two apoptotic pathways initiated by intracellular stress and involving the mitochondria.