1. The Lymphatic System

2. Roles of the Lymphatic System 1)One-way drainage system 2) Lipid Absorption from Small Intestine 3) Produce & circulates Immune cells.

4. Valves in lymphatic vessels prevent backflow of lymph.

6. Lymphoid Tissues: Un-encapsulated lymphatic tissues Tonsils 1)Pharyngeal 2) Palantine 3) Lingual Tonsil located in strategic locations

7. Lymphoid Tissues

8. Lymphoid Organs: Surrounded by fibrous capsule (encapsulated) Lymph Nodes Thymus Spleen

9. Structure of a Lymph Node

10. Derivation and Distribution of Lymphocytes

11. The Thymus

12. Behind the sternum (in anterior mediastinum) Where T cells Differentiate Involution (gets smaller) post puberty

13. The Spleen

14. Largest mass of lymphoid tissue in body Same functions for whole blood as lymph nodes for lymph