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 Vessels: Pathways of blood flow in human body, hollow tubes, of which there are three types-. Arteries: Carry blood away from heart to other body parts, very muscular and elastic. Capillaries: Microscopic blood vessels where exchange of nutrients with tissues take place.LOOD VESSELS: Human beings have a closed type of circulatory system which means blood does not come into direct contact with body tissues. Instead, the blood flows in restricted pathways called blood vessels. Materials are exchanged between blood and body tissues through the walls of blood vessels.