Term: pronephric tubule lumen
Name: pronephric tubule
Synonyms: ciliated neck segment
Definition: Bilaterally paired tubes connecting the pronephric glomeruli to the pronephric ducts. In zebrafish and other teleosts, the pronephric nephron and tubules form after the pronephric duct, connecting to the anterior-most tip of the pronephric ducts.
Ontology: Anatomy Ontology [ZFA:0001558]

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