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Learning About Our Immune System

Immunology

An introduction to how the human body stays healthy and fights germs.

science health biology
25 Questions Easy Ages 5+ Aug 13, 2026

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About this Study Set

This study set covers Immunology through 25 practice questions. An introduction to how the human body stays healthy and fights germs. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 25 questions from the Learning About Our Immune System study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the name of the system in your body that fights off germs?
  • A The digestive system
  • B The immune system
  • C The skeletal system
  • D The nervous system
2 What do we call tiny germs like bacteria that can make us sick?
  • A Pathogens
  • B Cells
  • C Nutrients
  • D Vitamins
3 Which cells in your blood act like little soldiers to protect you?
  • A Red blood cells
  • B White blood cells
  • C Platelets
  • D Brain cells
4 What is the liquid part of your blood that carries immune cells around?
  • A Water
  • B Plasma
  • C Orange juice
  • D Milk
5 What can you get to help your body learn how to fight a specific germ?
  • A A bandage
  • B A vitamin
  • C A vaccine
  • D A toy
6 What do white blood cells often do to germs to get rid of them?
  • A Eat them
  • B Give them a hug
  • C Feed them sugar
  • D Talk to them
7 Which part of your body is the first barrier that stops germs from entering?
  • A Your lungs
  • B Your skin
  • C Your bones
  • D Your hair
8 What is a fever often a sign of?
  • A Your body fighting a germ
  • B You being very cold
  • C Your body needing sleep
  • D You being hungry
9 What are the 'memory' cells in your immune system good at doing?
  • A Remembering how to fight past germs
  • B Counting your toes
  • C Storing your favorite songs
  • D Telling you to eat vegetables
10 What organ helps clean your blood of old cells and germs?
  • A The spleen
  • B The tongue
  • C The ear
  • D The nose
11 What substance is found in your nose and throat that traps dust and germs?
  • A Mucus
  • B Glue
  • C Paint
  • D Water
12 Which tiny structures in your body help filter out germs near your throat?
  • A Lymph nodes
  • B Teeth
  • C Fingernails
  • D Toenails
13 What is the process called when your body becomes immune to a germ?
  • A Protection
  • B Sleeping
  • C Running
  • D Dancing
14 How do white blood cells travel around your body?
  • A Through blood vessels
  • B By jumping
  • C Using a car
  • D On your skin
15 What can you wash off your hands to remove germs?
  • A Dirt and bacteria
  • B Water only
  • C Sunlight
  • D Fresh air
16 Which type of germ can be fought off by medicine called antibiotics?
  • A Bacteria
  • B Viruses
  • C Dust
  • D Pollen
17 What does your body produce to specifically target and lock onto germs?
  • A Antibodies
  • B Sugar
  • C Sweat
  • D Oil
18 What happens to a cut on your skin to help protect it from germs?
  • A It forms a scab
  • B It turns into a flower
  • C It glows
  • D It disappears
19 What is a common symptom when your immune system reacts to harmless pollen?
  • A Sneezing
  • B Growing taller
  • C Turning blue
  • D Singing
20 What do immune cells 'patrol' inside of?
  • A The bloodstream
  • B Your bedroom
  • C The kitchen
  • D The garden
21 Why is it important to wash your hands before eating?
  • A To remove germs
  • B To make them smell like soap
  • C To cool them down
  • D To change their color
22 What helps your immune system stay strong?
  • A Eating healthy food
  • B Watching TV all day
  • C Eating only candy
  • D Not sleeping
23 Which type of blood cell carries oxygen to your body?
  • A Red blood cell
  • B White blood cell
  • C Skin cell
  • D Bone cell
24 What is a protective shield against germs that covers your whole body?
  • A Skin
  • B A sweater
  • C A hat
  • D A blanket
25 What is it called when your immune system works well?
  • A Healthy
  • B Tired
  • C Confused
  • D Invisible
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