The Lymphatic System Aka. The Immune System
I. Introduction A. Functions: 1. Transport Lymph through vessels 2. Control/destroy microorganisms Lymphatic - capillaries Vessels Nodes Trunks ducts Fluid from blood capillaries
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
Worksheet Complete page 1. Define all words with * in your notes Complete the top of page 2 of the worksheet
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
Individual Work Read about lymph circulation on pages 351- 354 of A & P book. Complete worksheet
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
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