1. To return fluid leaked out in the intstitial spaces back to the blood stream
2. transport dietary lipids- blood only absorbs carbs and protiens - fats go into lymph
3. Lymphatic organs house lymphocytes
4. Generate an immune response and increase the lymphocyte population

Cervical region - neck

Axillary region - arms

Groinal region - legs

Everywhere that an appendage is attached

Order of Lymph Vessels

1. Capillaries
2. Vessels
3. Trunks
4. Ducts

1. Special types of lymphatic capillaries
2. They pickup interstitial fluid, dietary lipids and lipid soluable vitamins
3. GI Lymph is called Chyle

1. Red bone marrow
2. CNS
3. Avascular tissue

what is the structure of Lymphatic Vessels?

1. Resemble small veins
2. have 3 tunics
3. Valves

 where are the lymphatic ducts?

What regions of the body to they drain?

1. Right Lympatic duct - drains upper R. quadrant
2. Thoracic - L quadrant - entire lower body
3. Cisterna Chyli - from small intestine

1. Macrophages - monocytes that have migrated from the blood stream
2. Nurse cells - epithelial cells that secrete thymic hormone
3. Dendrite cells - Capture antigens and present them to other lymphatic cells
4. Lymphocytes - B lymphocytes, T lymphocytes and NK cells

1. Helper - Supervisors - initiate and oversee immune response - present antigens to other cells and secrete cytokines
2. Cytotoxic - kill by either secreting substances that break down the invading cell membrane or by triggering cell death.

 Two subsets - Memory cells

                      Suppressor cells               

1. Respond to one antigen - produce immunoglobulins - Antibodies
2. Cannot be activated until a helper T cell presents and antigen
3. Once activated creates plasma cells or memory B lymphocytes

What is MALT?

Where is it found? 

Thymus

(4) 

Spleen

(3)