Human Defense System

Question 1

What is a pathogen?

Answer 1

A pathogen is a foreign cell that causes a disease

Question 2

What is the general defence system

Answer 2

The general defense system tries to defend us against all pathogens

Preventing entry:

• skin acts as a barrier to all pathogens
• clotting helps prevent the entry of pathogens once our skin is damaged
• mucus in the respitory system is is sticky and traps pathogens