Lymphoid Nodules and Surface Epithelium of Chicken Cloacal Bursa

The surface of the bursa fold is covered by a pseudostratified columnar epithelium. This micrograph shows three lymphoid nodules with darker cortex and lighter medulla. A few lymphocytes can be seen emigrating through the surface epithelium. Note the nucleate red blood cells.G10. Original mag. 33x. Azure-Eosin. Cloacal bursa of Fabricius. Lymphoid System. Chicken.