constitutional_part_of regional_part_of Vasculature of body Systemic venous system Systemic venous tree organ Superior systemic venous tree FMA:82672 Superior vena caval tree Systemic venous tree (organ) the trunk of which, the superior vena cava, continues with the right atrium and the branches of which are distributed to the head, neck upper limbs, thorax and upper part of abdomen. Examples: There is only one superior systemiv venous tree. Upper systemic venous tree fma