1. Lymph System

2. Structure
System of lymph nodes connected by lymph vessels, throughout your body
Vessels are larger than capillaries, smaller than venules
Vessels contain valves to prevent back flow (low pressure)
Lymph – fluid surrounding tissues moves into vessels, similar to plasma

3. Components Lymph nodes Store lymphocytes
Lymph vessels bring them lymph which the nodes filter – trap foreign particles
Store lymphocytes

4. Collection of large lymph nodes at the back of throat
Tonsils & Adenoids
Collection of large lymph nodes at the back of throat
Produce lymphocytes and antibodies

5. Thymus Gland
Large in infants but shrinks during puberty
Helps produce T cells

6. Stores and releases blood when needed (blood loss)
Spleen
Largest lymph organ
Stores and releases blood when needed (blood loss)
Production of B cells

7. Bone Marrow Produces blood cells
Subclavian ducts – eventually the lymph travels to two collecting ducts that dump the lymph back into the blood in the subclavian veins