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 is circulated around the body by the heart through a system of blood vessels, forming the cardiovascular system. There are 3 kinds of blood vessels: arteries carry blood â¦ away from the heart to body; veins carry blood from the body to the heart; and capillaries carry blood in between tissues. The four-chambered heart acts as a pump and is the centre of the circulatory system.