the trachea and bronchi secrete that is moved by cilia the stomach produces acid, which kills the majority of pathogens that enter via the mouth. 4.3.3.4 If a pathogen enters the body Explain how the 1 Watch BBC video clip showing Observe prepared blood Blood smears the immune system tries to immune system phagocytosis (see resources). smears using a materials: destroy the pathogen. White defends against microscope or prepared slides Research how white blood blood cells are an important disease Draw the cells. microscopes cells defend the body. part of the immune system. bio-viewers. Describe what white Use models to represent ABPI animations of white They help to defend against blood cells do. phagocytosis and blood cell activity. pathogens through: BBC Bitesize video antibody specificity. Explain why antibodies clips – phagocytosis Observe white blood cells are specific for one Students predict level of producing antibodies under the microscope or BBC Bitesize – pathogen/antigen. antibodies in the blood producing antitoxins following vaccination ABPI Resources for – Outline the differences and following a Schools – between five key subsequent infection. antiseptic, antigen, antibiotic, Represent their antibody, antitoxin. prediction in a simple line graph. Draw diagrams or a cartoon strip to show the actions of white blood cells using key words: ingest
the trachea and bronchi secrete that is moved by cilia the stomach produces acid, which kills the majority of pathogens that enter via the mouth. 4.3.3.4 If a pathogen enters the body the immune system tries to destroy the pathogen. White blood cells are an important part of the immune system. They help to defend against pathogens through: phagocytosis producing antibodies producing antitoxins Explain how the immune system defends against disease Describe what white blood cells do. Explain why antibodies are specific for one pathogen/antigen. 1 Watch BBC video clip showing phagocytosis (see resources). Research how white blood cells defend the body. ABPI animations of white blood cell activity. Observe white blood cells under the microscope or Outline the differences between five key antiseptic, antigen, antibiotic, antibody, antitoxin. Draw diagrams or a cartoon strip to show the actions of white blood cells using key words: ingest Observe prepared blood smears using a microscope or Draw the cells. Use models to represent phagocytosis and antibody specificity. Students predict level of antibodies in the blood following vaccination and following a subsequent infection. Represent their prediction in a simple line graph. Blood smears materials: prepared slides microscopes bio-viewers. BBC Bitesize video clips – BBC Bitesize – ABPI – Resources for Schools –