Question 1

What is the immune system?

Accepted Answer

The immune system is like a protective shield inside your body that helps keep you safe from germs, like bacteria and viruses, that can make you sick.

Question 2

Why do we need an immune system?

Accepted Answer

We need an immune system to protect our bodies from harmful germs and to help us stay healthy. It fights off infections so we can feel good and do all the things we love.

Question 3

What are white blood cells?

Accepted Answer

White blood cells are special soldiers in your body that help fight off germs. They travel around in your blood, looking for anything dangerous.

Question 4

How does the immune system know when there are germs in the body?

Accepted Answer

The immune system has special sensors that detect when germs, like viruses or bacteria, enter the body. When this happens, the immune system starts working to get rid of them.

Question 5

What are antibodies?

Accepted Answer

Antibodies are tiny helpers made by your immune system that find germs and help destroy them. They're like keys that fit perfectly into the germs and help get rid of them.

Question 6

What happens when you get a fever?

Accepted Answer

When you have a fever, it's your body's way of fighting off germs. The higher temperature helps your immune system work better and makes it harder for the germs to survive.

Question 7

Can the immune system remember germs?

Accepted Answer

Yes, the immune system can remember germs it has fought before. This helps it respond faster and stronger if the same germ tries to attack the body again.

Question 8

What is a vaccine?

Accepted Answer

A vaccine is a special medicine that helps train your immune system to fight off certain germs. It's like a practice fight that helps your body get ready to protect you in the future.

Question 9

What happens when the immune system doesn't work well?

Accepted Answer

If the immune system doesn't work well, it might not be able to fight off germs effectively. This can make someone more likely to get sick.

Question 10

How can we help our immune system stay strong?

Accepted Answer

We can help our immune system by eating healthy foods, getting plenty exercise, sleeping well, and washing our hands to keep germs away.

Question 11

What are lymph nodes?

Accepted Answer

Lymph nodes are small, bean-shaped structures that help filter out germs and other harmful things. They are part of the immune system and work like checkpoints.

Question 12

What does the spleen do in the immune system?

Accepted Answer

The spleen helps filter the blood and removes old or damaged blood cells. It also helps the immune system by storing white blood cells ready to fight germs.

Question 13

What is the skin's role in the immune system?

Accepted Answer

The skin is like a barrier that keeps germs from entering the body. It acts as the first line of defense by keeping most germs out.

Question 14

Why do some people get allergies?

Accepted Answer

Allergies happen when the immune system overreacts to something harmless, like pollen or certain foods, thinking it's dangerous. This can cause sneezing, itching, or other reactions.

Question 15

What are autoimmune diseases?

Accepted Answer

Autoimmune diseases happen when the immune system mistakenly attacks the body's own healthy cells. It's like confusing friends with enemies.

Question 16

How does stress affect the immune system?

Accepted Answer

Being stressed can make the immune system weaker, making it harder to fight off germs. That's why it's important to find ways to relax and be happy.

Question 17

What are tonsils and what do they do?

Accepted Answer

Tonsils are two lumps in the back of your throat that help trap and fight germs. They are part of the immune system's protection plan.

Question 18

Why do my cuts and scrapes heal on their own?

Accepted Answer

When you get a cut or scrape, your immune system and body work together to repair it. They stop germs from entering and help new skin grow.

Question 19

Can animals get sick too?

Accepted Answer

Yes, animals have immune systems like humans, and they can get sick if their immune system is unable to fight off germs. They also have ways to stay healthy, like vaccines.

Question 20

Why do we need rest when we're sick?

Accepted Answer

Resting gives your body the energy it needs to fight off germs. While you sleep or relax, your immune system works hard to make you feel better.

The Structure and Functions of the Human Immune System - 20 FAQs Explained Simply