Immune System: Defenders Unite!

What is a pathogen?

• A helpful cell in the immune system

• A type of antibiotic

• A microorganism that causes disease

• A white blood cell

Which of these is part of the First Line of Defence?

• White blood cells

• Antibodies

• Skin

• Fever

What is the main job of cilia?

• Produce stomach acid

• 1. Sweep mucus and trapped germs out of the airways

• Make antibodies

• 1. Increase your temperature

Which line of defence involves inflammation and fever?

• First

• Second

• Third

• Fourth

What is pus made of?

• 1. Stomach acid and germs

• 1. Sweat and blood

• White blood cells, bacteria, and dead tissue

• Mucus and saliva

What do lymphocytes do?

• 1. Produce mucus

• Digest food

• Make antibodies to fight specific germs

• Cause fever

Which part of the immune system remembers past infections?

• Cilia

• Antibodies

• Mucus

• Skin

What does stomach acid do in the first line of defence?

• Kills most pathogens swallowed with food

• Helps antibodies work

• Cleans your intestines

• Makes mucus

What is the purpose of a fever during infection?

• To make you drink more water

• 1. To cool your body down

• 1. To help pathogens grow faster

• To slow down germs and help immune cells work better

Which shows the correct order of the lines of defence?

• 1. Antibodies → Skin → Inflammation

• 1. Inflammation → Antibodies → Cilia

• Skin → Inflammation → Antibodies

• Coughing → Fever → Mucus