Term: caudal vein anatomical region
Name: caudal vein
Synonyms: CV
Definition: Vein in the tail returning blood from the trunk and tail to the heart, leads directly into the posterior cardinal vein in the posterior trunk.
Ontology: Anatomy Ontology [ZFA:0000180]

Name: anatomical region
Synonyms:
Definition: A 3D region in space without well-defined compartmental boundaries; for example, the dorsal region of an ectoderm.
Ontology: Spatial Ontology [BSPO:0000070]