Fighting disease

Question 1

how is the body’s defence system sophisticated

Answer 1

skin - barrier of pathogens - secrets antimicrobial substances that kill pathogens
hairs and mucus in nose - trap particles that could contain pathogens
trachea and bronchi - secrete mucus to trap pathogens i - lined with cilia, which waft mucus to back of the throat to be swallowed
hydrochloric acid in stomach - kills pathogens that make it through the mouth

Question 2

how does the immune system attack pathogens

Answer 2

white blood cells travel around the body

Question 3

name and describe the three lines of attack white blood cells have

Answer 3

consuming them - engulf foreign cells and digest them - phagocytosis
producing antibodies - lock onto invading cells so they can be destroyed by white blood cells
producing antitoxins - invading bacteria