Term: blood vasculature lumen
Name: blood vasculature
Synonyms: blood vessel
Definition: Is an interconnected tubular multi-tissue structure that contains blood that is actively transported around the organism.
Ontology: Anatomy Ontology [ZFA:0001079]

Name: lumen
Synonyms:
Definition: Anatomical space within a tubular organ, duct, or vessel.
Ontology: Anatomy Ontology [ZFA:0005930]