Term: gill filament epithelium
Name: gill filament
Synonyms: gill filaments
Definition: Portion of tissue that projects outward from the gill and is a thread-like, soft, red respiratory and excretory structure.
Ontology: Anatomy Ontology [ZFA:0000667]

Name: epithelium
Synonyms:
Definition: Portion of tissue, that consists of one or more layers of epithelial cells connected to each other by cell junctions and which is underlain by a basal lamina.
Ontology: Anatomy Ontology [ZFA:0001486]