Science Assessment
Storyboard Text
- How does the body the fight off the disease ?
- The immune system's three lines of defence that fight off the disease
- The first line of defence are the surface barriers that prevent the entry of pathogens into the body.
- What are the lines of defence?
- What happens if the pathogen enter the body?
- If they are able to enter the body, the second line of defence becomes active. Through steps called immune response. The immune system attacks those pathogens.
- What does the third line of defence do ?
- The third line of defence are specific lymphocytes that produce antibodies as part as the adaptive immune response.
- The aim of the immune system is to identify and defend from viruses, bacteria and other pathogens.
- So the reason for the immune system is to protect your body from harmful cells and germs.
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