LYMPHATIC SYSTEM.pptx for nurses in details

lymphatic system for nurses

1. LYMPHATIC SYSTEM

2. Introduction Circulatory system consist of: CVS Lymphatic system

3. Network of organs, collection of tissues and lymphatic vessels

4. Tissue drainage (3-4 L/day) Absorption in the small intestine Immunity

5. Interstitial/Tissue fluid - around all body tissues Some fluid return to capillaries Remainder diffuses through more permeable walls of lymph capillaries and becomes lymph

6. Lymphatic system

7. Components are: Lymph Lymphatic vessels Lymph nodes Lymphatic organs: Spleen and thymus Diffuse lymphoid tissue eg . Tonsils Bone marrow

8. Lymph and Lymphatic vessels

9. Lymph Clear, colorless watery fluid Transports plasma proteins that seep out of capillary beds back to bloodstream Also carries away larger particles, e.g. bacteria and cell debris from damaged tissues Filtered out and destroyed by lymph nodes Contains lymphocytes

10. Lymphatic capillaries Originate as blind-end tubes in interstitial spaces Same structure as blood capillaries Join up to form larger lymph vessels Exceptions : Central nervous system Cornea of the eye Bone and bone marrow Most superficial layers of skin Cartilage

11. Lymphatic vessels Found running alongside arteries and veins Walls have same 3 layers Cup-shaped valves

12. Lymphatic vessels

13. Become larger as they join together : Lymphatic trunks Thoracic duct and right lymphatic duct Empty lymph into subclavian veins

14. Thoracic duct Begins at cisterna chyli (L1-L2) 40 cm long Opens into left subclavian vein Drains lymph from both legs, the pelvic and abdominal cavities , the left half of the thorax, head and neck and the left arm

15. Right lymphatic duct A dilated lymph vessel about 1 cm long Opens into right subclavian vein Drains lymph from the right half of the thorax, head and neck and the right arm

16. Lymphatic vessels

17. Lymphatic Cells

18. NK cells Lymphocytes B-Lymphocytes T-Lymphocytes Macrophages Dendritic cells

19. Lymphatic Tissues

20. Aggregations of lymphocytes in connective tissues of mucus membranes and various organs Simplest form - Diffuse lymphatic tissue Particularly prevalent in body passages that are open to the exterior— respiratory, digestive, urinary, and reproductive tracts— MALT

21. In some places, dense masses - lymphatic nodules (follicles) Lymph nodes, tonsils, and appendix In the ileum - Peyer patches

22. Lymphatic (Lymphoid) Organs

23. Well-defined anatomical sites Connective tissue capsules Include: Red bone marrow Thymus Lymph nodes Spleen

24. Red Bone Marrow Soft, loosely organized, highly vascular material Hemopoiesis and immunity Important supplier of lymphocytes

25. Lymph node Oval or bean-shaped Most numerous lymphatic organs Along the length of lymph vessels – in groups Vary in size

26. Structure Capsule : fibrous connective tissue Reticular tissue : support Lymphatic tissue : immunity Many afferent vessels, usually only one efferent vessel 31

27. Structure Collection of lymph nodes: Cervical Axillary Inguinal Clinical correlates: Lymphadenopathy Matted lymph nodes: TB

28. Functions Filtering and phagocytosis Proliferation of lymphocytes

29. Spleen Largest lymph organ Left hypochondrium Between fundus of stomach and diaphragm 12*7*2.5 cm 200 g

30. Spleen