Bodydefence

Question 1

Name three External defences against microbes

Answer 1

• Sticky mucus in the windpipe that stops microbes getting into lungs
• Skin as a barrier against microbes getting into th body
• Acid in the stomach that kills what you swallow

Question 2

Name two Internal defences against microbes

Answer 2

• White blood cells that destroys microbes in the blood

- Antibodies that destroy microbes in the blood

Question 3

Name an artificial defence against microbes.

Answer 3

Vaccinations

Question 4

What is a vaccine?

Answer 4

A dead or altered form of a disease e.g. dead virus.

Question 5

How does a vaccine work?

Answer 5

The vaccine does not make the person ill, but their immune system responds and makes antibodies which stay in the body and give long term protection against the disease.