
Aggregated lymphoid nodules: Appendix
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

Primary nodules
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

Secondary nodules
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

- Germinal centers
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

Diffuse lymphoid tissue
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

Area shown in next image
The appendix possesses both diffuse and nodular lymphoid tissue in the lamina propria. The presence of germinal centers differentiates secondary from primary lymphoid nodules. All these lymphoid tissues filter tissue fluid of the lamina propria. 40x

Image source >
Image taken of a slide from the University of Michigan collection.