1. LYMPHATIC SYSTEM Chapter 20

2. FUNCTIONS Drain tissue fluid Drain tissue fluid House phagocytic cells and lymphocytes House phagocytic cells and lymphocytes Absorb digested fats via lacteal Absorb digested fats via lacteal

3. COMPONENTS Lymphatic vessels Lymphatic vessels Lymphatic cells and tissues Lymphatic cells and tissues Lymphatic organs Lymphatic organs

4. LYMPH VESSELS

5. LYMPHATIC VESSELS

6. Lymph capillaries Lymph capillaries Lymphatic collecting vessels Lymphatic collecting vessels Lymphatic trunks Lymphatic trunks Lymphatic ducts Lymphatic ducts

7. LYMPHATIC VESSELS Right lymphatic duct Right lymphatic duct –Right subclavian Thoracic duct Thoracic duct –Cisterna chyli –Left subclavian

8. LYMPH CELLS AND TISSUE

9. LYMPHATIC CELLS AND TISSUE Lymphatic cells Lymphatic cells –Lymphocytes –Macrophages –Reticular Cells –Dendritic cells Lymphoid Tissue Lymphoid Tissue

10. LYMPH ORGANS

11. Lymph nodes Lymph nodes –Inguinal region –Axillary region –Cervical region

12. LYMPH ORGANS Lymph node structure Lymph node structure –Capsule –Trabeculae –Cortex –Medulla –Afferent lymphatic vessels –Efferent lymphatic vessels

13. LYMPH NODE

14. OTHER LYMPH ORGANS Spleen Spleen Tonsils Tonsils Thymus gland Thymus gland Peyer’s patches Peyer’s patches

15. SPLEEN

16. TONSILS

17. THYMUS GLAND

18. Aggregates of Lymph Tissue Appendix Appendix Peyer’s Patches Peyer’s Patches

19. PEYER’S PATCHES

20. Aggregates of Lymph Tissue Appendix Appendix Peyer’s Patches Peyer’s Patches MALT=mucosa-associated lymphatic tissue MALT=mucosa-associated lymphatic tissue

21. Control and Rate of Flow New lymph New lymph Valves Valves Muscular pump Muscular pump Respiratory pump Respiratory pump Artery pulsations Artery pulsations Peristalsis Peristalsis

22. DISORDERS OF THE LYMPHATIC SYSTEM Buboes Buboes Elephantiasis Elephantiasis –Caused by a parasitic worm known as Wucheria bancrofti Hodgkin’s disease Hodgkin’s disease –Characterized by Reed-Sternberg cells Lymphoma Lymphoma –Tumor of lymphoid tissues Tonsillitis Tonsillitis –Inflammation and congestion of tonsils usually due to a bacterial infection