Definition: Thin-walled sacs or spaces which function as a part of the respiratory system in birds, fishes, insects, and mammals.
in birds, fish, insects & mammals; sacculitis in veterinary animals: coord IM with RESPIRATORY TRACT DISEASES/vet (IM) or RESPIRATORY TRACT INFECTIONS/vet (IM)
Other names Swimbladder; Air Bladder; Swimbladders; Sacs, Air; Sac, Air; Bladders, Air; Bladder, Air; Air Sac; Air Bladders