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1 of 10© Boardworks Ltd 2013 Microbes and disease To enable the animations and activities in this presentation, Flash Player needs to be installed. This can be downloaded free of charge from http://get.adobe.com/flashplayer/ http://get.adobe.com/flashplayer/
2 of 10© Boardworks Ltd 2013 Science Ages 11-14
3 of 10© Boardworks Ltd 2013 Fighting disease
4 of 10© Boardworks Ltd 2013 How does disease spread?
5 of 10© Boardworks Ltd 2013 Defences against disease Harmful microbes can cause disease by damaging body cells. Once microbes have entered the body, it’s important that they are removed as quickly as possible to reduce damage. The body’s immune system uses specialized cells called white blood cells to identify and destroy the microbes. How does the body try to stop harmful microbes from entering?
6 of 10© Boardworks Ltd 2013 The body’s defences
7 of 10© Boardworks Ltd 2013 What do white blood cells do? If harmful microbes enter the body the immune system produces white blood cells to help defend it from microbes. Some white blood cells can destroy microbes by engulfing them. Some white blood cells are able to produce chemicals called antibodies. These pair with matching antigens on the surfaces of microbes and so help the white blood cells to engulf microbes. white blood cell bacteria antigen
8 of 10© Boardworks Ltd 2013 Destroying microbes
9 of 10© Boardworks Ltd 2013 Producing antibodies
10 of 10© Boardworks Ltd 2013 Webinar
AVOIDANCE & TREATMENT OF INFECTIOUS DISEASE
The Body’s Natural Defences
Blood, transport and infections By Tibor Cemicky.
Immunity Review. Explain how wbc’s can protect the body against disease. Wbc’s produce antibodies and memory cells when a pathogen (antigen) enter the.
LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON.
Starter (from the end of last lesson) 1.What are the similarities between a virus and bacteria? 2. What are the main differences between a virus and bacteria?
First line of defense (non-specific barriers) : physical and chemical barriers that prevent pathogens from entering (skin, mucus, acids in the stomach,
IMMUNITY ABBOTTS 2010.
KS3 Biology 8C Microbes and Disease.
Antibody Structure and Function
The Immune System. What Is It? The immune response is how your body recognizes and defends itself against bacteria, viruses, and substances that appear.
Immune System Overview What causes disease? ► An organism that causes an infection or disease is called a pathogen ► Types of pathogens include virus,
Boardworks KS3 Science 2008 Microbes and Disease
Microbes and Diseases Microbes or micro-organisms can only be seen using a m . They can infect our bodies and cause d.
Immune System The body’s primary defense against disease causing pathogens that threaten our homeostasis. Can be identified by molecules on their outer.
Immune System “Do I still have to go to school doc?”
Red Blood Cells Carry oxygen around the body. They are biconcave, this means disc shaped with a dimple on each side. This shape increases the cell’s surface.
Lymph System Types of Immunity.
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