Lymphatic system

3. cells that replace the thymus after involution
4. aggregated lymphatic nodules in pharynx
6. organs that generate lymphocytes from progenitor cells
7. this structure within lymphatic vessels prevents backflow
9. pulp in the spleen that consist of follicles and Periarterial lymphoid sheaths
12. type of circulation system seen in the spleen
13. T cell site within the spleen
14. secondary organ responsible for filtering/storing blood
15. cells found in the paracortical tissue of the lymph node
18. specialized epithelial cells that pinocytose GI contents
21. site for B cell maturation in birds
23. secondary organ responsible for filtering lymph
24. rich content of erythrocytes within sinuses of the ruminant
25. organs that are sites of lymphocyte activation/differentiation in context of immune response
26. structures within the spleen that contains vasculature, connective tissue, and smooth muscle
27. cells found in primary and secondary follicles

1. dendritic cells, macrophages, B cells
2. calcified cells surrounded by keratin found in the thymic medulla
5. B cell site within the spleen
6. aggregated lymphatic nodules in the small intestine
8. site for T cell maturation
10. source of pluripotent stem T and B cells
11. indentation where afferent and efferent vasculature enter and leave the lymph node, respectively
16. blind ended chyle-filled capillaries in the small intestine
17. single or aggregations of lymphoid nodules found at mucosal surfaces
19. Thymic area for positive T cell selection
20. first sinus in afferent lymph vessel travel in the lymph node
22. pulp in the spleen that consists of sinusoids