Term: vein blood circulation
Name: vein
Synonyms: venous system
Definition: Vessels that carry blood to the heart.
Ontology: Anatomy Ontology [ZFA:0000082]

Name: blood circulation
Synonyms: hemolymph circulation
Definition: The flow of blood through the body of an animal, enabling the transport of nutrients to the tissues and the removal of waste products.
Ontology: GO: Biological Process [GO:0008015]    QuickGO    AmiGO