1. Learning Objective Describe the human defences against disease
To be able to:
Describe the human defences against disease
Key Words:
non-specific, immune system, white blood cells

2. Exam Question Tuesday, 14 May 2019 Human Defence System
Date and title in books. You need a pen, pencil & a ruler.
Starter Activity – 2 minutes
Exam Question

3. Learning Outcomes Identify non-specific defence systems
Target 1-9
Identify non-specific defence systems
State that blood contains white blood cells
(F/H)
Target 4-9
Describe how white blood cells defend the body
(H)
Target 5-9
Explain how white blood cells defend the body
Extension: Application of Knowledge
Target 8/9
Explain the effects of an autoimmune disease
Learning Outcomes

4. How do our bodies stop microbes getting in?
Saliva
Hairs
(in trachea)
Skin
Scabs
Mucus
Acid
Students copy 15

5. But what happens if they do get into your body?

6. What’s in our blood?

7. White blood cells

8. What do white blood cells do?
White blood cells can:
ingest pathogens and destroy them – this is called phagocytosis.
produce antibodies to destroy pathogens
produce antitoxins that neutralise the toxins released by pathogens