Lymphatic & Immune System

Functions:

1. Protection from pathogens (immune system)
2. Transports lipid-solube vitamins (A, D, E, K) and dietary lipids.
3. Drains the ECF (interstitial fluid)

Immune Resistance is the ability to use our body's defenses to prevent disease.

Two Types:

1. Nonspecific or Innate (you're born with it)
2. Specific (Immunity)- activation of T-cells and B-cells (lymphocytes)

Components of the Lymphatic & Immune System

Lymphatic Nodules (i.e. tonsils)	Masses of lymphatic tissue. Located in G.I., reproductive, urinary, and respiratory tracts.
Lymph Nodes	Filter lymph, contain lymphocytes. There are many lymph nodes in the mammary tissue, axilla (armpit), and groin areas.
Spleen (largest lymphatic structure)	Large organ for filtration. It is a blood reservoir as well.
Thymus	T-cells mature in the Thymus.
Red Bone Marrow	Makes lymphocytes (T-cell and B-cells). B-cells mature in red Bone marrow.
Lymphatic Vessels	Similar to veins.
Lymph	Interstitial fluid that has seeped into the lymphatic vessels.

Two Ducts drain the lymphatic system back into the blood stream.

1. R. Lymphatic Duct-drains the head, R. chest, and R. arm
2. Thoracic Duct- drains everything else.

How does lymph get back up to the ducts to it can drain?

1. Skeletal Muscle Pump
2. Respiratory Pump

• Metastasis is the spread of disease from one body part to another, often through the lymphatic system.

Links for this system

Immunology Website:

• http://www.whfreeman.com/kuby/con_index.htm?99anm

Allergy Animation:

• http://flash.illustratedideas.com/iiicatalog/animation/med/fam/allergy/shell.swf

Vaccination Animation:

• http://www.schoolscience.co.uk/content/4/biology/abpi/immune/images/vaccination.swf

Components of the Lymphatic System:

• http://training.seer.cancer.gov/module_anatomy/unit8_2_lymph_compo.html

Lymphatic System Quizzes:

• http://www.betterhealth.vic.gov.au/bhcv2/bhcsite.nsf/pages/quiz_lymphatic_system?Open
• http://www.mhhe.com/biosci/ap/holeessentials/student/olc/add14.htm