Human defence system

Question 1

How does the nose defend

Answer 1

contains hairs and mucus to trap pathogens 

Question 2

how does the skin defend

Answer 2

acts as a barrier that can be repaired, covered with micro organisms that act as an extra barrier

Question 3

how does the trachea and bronchi defend

Answer 3

produces mucus to trap pathogens have cilia to waft the mucus back up to the throat where it’s swallowed.

Question 4

How does the stomach defend

Answer 4

contains hydrochloric acid, that kills most pathogens

Question 5

The immune system

Answer 5

Phagocytosis- this is when a white blood cell engulfs, a pathogen and digests it, destroying it
antibody production-pathogens have antigens on their surfaces. Some white blood cells can make antibodies these attach to the antigens and label the pathogen for destruction.
antitoxin production, anti-toxins can counteract or neutralise the toxins released by pathogens
Vaccinations a small amount of dead or inactive pathogen is put into the body. The white blood cells detect the antigens of the pathogen, and begin, producing the correct antibodies. If the real pathogen enters, the body than the white blood cells can produce the antibodies, much quicker and the pathogen is destroyed, quickly