The First Line Of Defence

Question 1

What features does the skin have that prevent pathogens entering the body?

Answer 1

Forms a barrier to germs, glands make an antiseptic oil that kills many germs, if the skin is broken blood clots form.

Question 2

What features does the digestive system have that prevent pathogens entering the body?

Answer 2

Stomach acid kills germs in your food. You may also vomit as food containing germs tastes horrible.

Question 3

What features does the eyes have that prevent pathogens entering the body?

Answer 3

The tear glands produce an enzyme called lysozyme that acts as an antiseptic killing some germs.

Question 4

What features does the nose have that prevent pathogens entering the body?

Answer 4

Mucus traps the pathogens and tiny hairs called cilia move the mucus and germs to your throat where you swallow and pass the pathogens safely out your body.

Question 5

What features does the respiratory system have that prevent pathogens entering the body?

Answer 5

Your nose and air passages are lined with cells that produces mucus, this traps dirt and germs.