1. The Lymphatic System
Aka. The Immune System

2. I. Introduction A. Functions: 1. Transport Lymph through vessels
2. Control/destroy microorganisms
Lymphatic
- capillaries
Vessels
Nodes
Trunks
ducts
Fluid from
blood capillaries

3. B. Structures of your Lymphatic System - use page 348 of the A&P book to complete this chart
Function
Lymph nodes
Tonsils and peyer’s patches
Lymphatic Vessels
Spleen
Lacteals

4. Worksheet Complete page 1. Define all words with * in your notes
Complete the top of page 2 of the worksheet

5. II. Functions of the Lymphatic System
Transporting Lymph through Vessels
Fluid in tissues
Fluid is now called lymph
Simple squamous epithelial tissue
Lymphatic capillaries
Lymphatic vessels
- Valves ensure lymph moves in one direction
Almond – sized
3 main areas: groin, armpit, neck
Contain WBCs
Lymph nodes
Lymphatic vessels
Lymphatic duct
Vein/ Heart

6. Individual Work
Read about lymph circulation on pages of A & P book.
Complete worksheet

7. B. Activating an Immune Response
1. Lymph nodes perform biological filtration.
- filter out pathogens in lymph
- prevent infections from spreading
2. Thymus is where WBCs mature. WBCs then move to your spleen, lymph nodes and tonsils.
- 3 tonsils: palatine, pharyngeal, lingual

8. The Immune System Your body’s defense system
Molecules: antibodies & complement proteins
2 types of WBCs
1. Phagocytes: ‘eat’ germs
2. Lymphocytes: T-cells & B-cells
Make antibodies
Attack germs