![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
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 <p>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</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Or.Ly_.Tiss-9-1-ping.png)
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 <p>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</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Or.Ly_.Tiss-9-2-ping.png)
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 <p>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</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Or.Ly_.Tiss-9-3-ping.png)
- 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 <p>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</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Or.Ly_.Tiss-9-4-ping.png)
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 <p>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</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Or.Ly_.Tiss-9-5-ping.png)
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 > <p>Image taken of a slide from the University of Michigan collection.</p>](https://digitalhistology.org/wp-content/uploads/2017/11/Michigan-source-ping.png)
Image source >
Image taken of a slide from the University of Michigan collection.