Term: intestine lumen apical surface
Name: intestine lumen
Synonyms: gut lumen
Definition: Anatomical space within the intestine where digestion normally occurs. The intestinal lumen begins as an interconnected web of small space at 43 hpf that over time remodels to form a single continuous tube at 68hpf. Lumen maturation proceeds from anterior to posterior along the intestine.
Ontology: Anatomy Ontology [ZFA:0005807]

Name: apical surface
Synonyms:
Definition: Anatomical surface that is located on the apical side of the body or body part.
Ontology: Spatial Ontology [BSPO:0000373]