Gut-associated-lymphoid tissue of the chicken.
D000367:Age Factors; D000818:Animals; D002060:Bursa of Fabricius / Q000648:ultrastructure; D002645:Chickens / Q000033:anatomy & histology*; D004848:Epithelium / Q000648:ultrastructure; D006410:Hematopoiesis; D007422:Intestines / Q000033:anatomy & histology; D008221:Lymphoid Tissue / Q000276:immunology / Q000648:ultrastructure*; D010581:Peyer's Patches / Q000648:ultrastructure