Lymphoid Nodules and Surface Epithelium of Chicken Cloacal Bursa
![](https://sites.tufts.edu/vetimages/files/2021/07/Lymphoid_Nodules_and_Surface_Epithelium_of_Chicken_Cloacal_Bursa-26606.jpg)
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.