|Description:||The cloacal bursa of Fabricius in birds is a lymphoid organ in the
cloaca. Mucosal folds (pleicae) project into the lumen of the bursa.
Numerous lymphoid nodules (follicles) are found in the lamina propria
of each fold. Each nodule has a darker cortex with densely packed small
lynphocytes and a lighter staining, less dense medulla containing cells
of various sizes. The lymphoid cells of the bursa are cof the B-cell
lineage. Oirginal mag. 13x Azure-Eosin. Cloacal bursa of Fabricius.
Lymphoid System. Chicken.|