2.  Student should be able to  Describe the parts and location of lymphatic system

3.  Lymph  Lymph vessels  Lymph nodes  Lymph organs

4.  Lymph is a clear watery fluid, similar in composition to plasma, except plasma proteins.  Carry large particles including bacteria which are destroyed by lymph nodes  Lympha in small intestine – Chyle

6. Lined by endothelial cells Present in all parts of the body EXCEPT – Central Nervous System – Bones – Superficial layers of skin Join together to form Lymphatic vessels Lymphatic vessels join together to form – Thoracic duct  Left subclavian vein – Right lymphatic duct  Right subclavian vein

8.  Oval or bean shaped  Functions  Filtration  Phagocytosis  Proliferation of lymphocytes

11.  Presence of lymph follicles with germinal centers  Covered by capsule

12. Largest lymphatic organ Left hypochondriac region Functions – Phagocytosis – Abnormal cells – Storage of blood – 350 ml of blood – Immune response – enlarge during infection (splenomegaly) – Erythropoiesis

14.  Microscopic structure:  Trabeculae  Red pulp – contains blood  White pulp – contains lymphatic tissue  Central arteriole present

15. Lies in the upper part of mediastinum behind sternum Grows until puberty then regresses Functions – Production of T lymphocytes – Produce “Thymosin” hormone Microscopic structure: – Presence of Hassal’s corpuscle

18.  TONSIL  Located in oralcavity  Tonsillar crypt present  PEYER’S PATCHES  Located in small intestine

19.  Ross & wilson anatomy & physiology 10 th edition – Pgs 132 - 137