Assertion: gill | /r/MadeOf | 4 gill arches
Facets:
value: in osteichthyes
type: LOCATION
value: on each side of the head
type: LOCATION
Source sentences:
text: In osteichthyes, the gills contain 4 gill arches on each side of the head, two on each side for chondrichthyes or 7 gill baskets on each side of the fish's head in Lampreys.