The Amazing Immune System

Immunology

Explore how the human body protects itself from germs, viruses, and diseases through the complex network of the immune system.

Science Biology Health Human Body

6 Questions Medium Ages 5+ Apr 12, 2026

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About this Study Set

This study set covers Immunology through 6 practice questions. Explore how the human body protects itself from germs, viruses, and diseases through the complex network of the immune system. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 6 questions from the The Amazing Immune System study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the body's first line of defense that acts as a physical barrier against germs?

A The skin
B The heart
C The lungs
D The brain

2 Which type of blood cells are responsible for fighting infections and diseases?

A Red blood cells
B White blood cells
C Platelets
D Plasma

3 What are the Y-shaped proteins that stick to germs to mark them for destruction?

A Hormones
B Vitamins
C Antibodies
D Enzymes

4 What is a weakened or dead version of a germ used to teach the immune system how to fight?

A A vaccine
B An antibiotic
C A vitamin
D A bandage

5 Which parts of the immune system often swell up when you are sick because they are filtering out germs?

A Muscles
B Bones
C Nerves
D Lymph nodes

6 What do we call the process where a white blood cell surrounds and 'eats' a germ?

A Digestion
B Phagocytosis
C Respiration
D Circulation

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