Body Defense System and White Blood Cells

Question 1

What is one of the most protective barriers that your body has?

Answer 1

Skin as the pathogen cannot penetrate through it

Question 2

How does your nose prevent pathogens from entering?

Answer 2

Your nose is lined with hairs that trap pathogens and particles such as dust

Question 3

What organ is good for breaking down pathogens?

Answer 3

Stomach

Question 4

Why is your stomach good for killing pathogens?

Answer 4

Hydrochloric acid in your stomach breaks down any pathogens that enter with food

Question 5

What 2 antis do white blood cells create?

Answer 5

Antitoxins and antibodies

Question 6

What is phagocytsis?

Answer 6

This is when white blood cells ingest and digest pathogens to kill them

Question 7

What are antigens?

Answer 7

These are created by pathogens in a specific shape to infect the body

Question 8

How are antigens treated?

Answer 8

White blood cells create antibodies which match the shape of the antigen to destroy the pathogen

Question 9

What is a toxin?

Answer 9

Toxins are made by pathogens to cause damage to the body or make you feel unwell

Question 10

Why do white blood cells “remember” previously encountered diseases?

Answer 10

So they will be able to produce antibodies quicker if the body gets infected with the same or similar disease again

Question 11

What type of pathogens are phagocytes drawn to?

Answer 11

They are drawn to pathogens that are “marked” with antibodies