Eversion of abdominal air sac in domestic fowl (Gallus domesticus).
D000400:Air Sacs; D000818:Animals; D001982:Bronchial Diseases / Q000209:etiology / Q000662:veterinary*; D002645:Chickens; D005260:Female; D008297:Male; D011201:Poultry Diseases / Q000209:etiology