Any of the tubular branching vessels that carry blood from the capillaries toward the heart.

Subdivision of venous tree (organ) which consists of branching sets of tubes (venous trunks) that form a tree; together with other venous trees (organ part), it constitutes a venous tree (organ). Examples: subclavian venous tree, jugular tree, extrahepatic portal tree, common iliac venous tree.

Vessels that carry blood to the heart.