Where would you be without your bones? Learn more about the skeletal system in this article for kids.

The digestive system breaks down the food you eat. Learn how in this article for kids.

The endocrine system produces hormones, which are needed for proper body function and growth. Find out more in this article for kids.

Ever wonder how your eyes work? This article for kids takes you from the pupil to the retina and beyond.

Having a bad hair day? Find out all about hair in this article for kids.

Your heart is a hard-working muscle. Find out more in this article for kids.

The immune system keeps you healthy. How does it work? Find out in this article for kids.

You need at least one kidney to live. Find out why in this article for kids.

Your liver cleans your blood and plays an important part in digestion. Find out more in this article for kids.

What's something kids are doing all day, every day? Breathing! Your lungs are large and in charge of breathing, so read all about them in this article.

You have more than 600 muscles in your body! They do everything from pumping blood throughout your body to helping you lifting your heavy backpack. Find out more.

No matter how you think of it, your skin is very important. It covers and protects everything inside your body.

You pee every day, but what makes it happen? Find out in this article for kids about the urinary system.

Do you know someone who has - or had - breast cancer? Find out more in this article for kids.

Chemotherapy is a big word for treatment with medicines used to help people who have cancer. This medicine kills the cancer cells that are making the person sick.

Hodgkin lymphoma is one of the most common cancers in kids ages 10 to 14. Read our article to find out more.

When kids get cancer, it can often be treated and cured. Find out more in this article for kids.

What does it mean when a kid has anemia? Learn about anemia, why kids get it, and how it's treated in our article for kids.

Find out the answer to this personal question!

Find out the answer to this personal question!

Find out the answer to this personal question!

Find out the answer to this personal question!

Find out the answer to this personal question!

Find out the answer to this personal question!

When you go to the doctor for a checkup, it's because your parents and your doctor want to see that you're growing just the way you should. Read all about what happens at the doctor's office.

Every day, you lose about 50 to 100 hairs. But when someone has hair loss, the hairs may not grow back for a while.

It's fun to be outside on a hot, sunny day. But too much sun and heat can make you feel terrible. Find out how to stay safe in this article for kids.

A nurse is often the first person you see when you're sick. Find out more about this important member of your health care team.

Radiation therapy is a treatment that can help people with cancer. Learn what's involved and how it works.

When you need help right away, you can go to the emergency room of the nearest hospital. This article tells you what will happen when you get there.

Surgeries and operations happen in the operating room, sometimes called the OR. Find out more in this article for kids.

You've taken medicine before. But what is it?

Have you ever been afraid? Everyone gets scared sometimes. Find out more about fear in this article for kids.

Everybody gets stressed from time to time. This article for kids has some tips for you to try the next time you're stressed.

It may seem scary to go to a hospital, but doctors and nurses are there to help people who are sick or hurt feel better. Read our article for kids to find out what happens inside a hospital.

All kids feel scared once in a while. Find out what frightens them in this article for kids.

You need self-esteem, but it doesn't always come naturally. Find out what it means to feel good about yourself.

Stress happens when you are worried or uncomfortable about something. You may feel angry, frustrated, scared, or afraid. Our article for kids will help you manage stress.

Did you know that anger isn't all bad? Find out more in this article for kids.

Noticing your feelings and saying how you feel can help you feel better. This article for kids has ideas on how to practice talking about feelings and emotions.

Everyone gets angry sometimes. Does your temper ever get out of control? Find out how to put a leash on it.

When a friend has cancer, you might not know what to do or say. Get some ideas in this article for kids.

Feeling down? Got the blues? Everyone feels sad sometimes. Find out more in this article for kids.

Everyone worries, but would you like to worry less? Find out more in this article for kids.

Sometimes you need a medical test to give your doctor more information about your health. Find out how 10 common tests are done in these videos for kids.

Sometimes, when doctors are not sure what's wrong with a part of your body, they might decide to do a test called a biopsy.

Blood is made up of different parts, such as red blood cells, white blood cells, and platelets.

Actually, CT scans have nothing to do with cats, except that when people talk about them, they usually say "CAT scan" instead of "CT scan."

A spinal tap is an important test for diagnosing illnesses, such as meningitis.

Like an X-ray, an ultrasound is a way of looking at what's going on inside a person's body.

X-rays are special pictures of the inside of your body.

Cancer is a serious illness that needs special treatment. Find out more about how kids can cope with cancer.

Amanda's life changed dramatically when she was diagnosed with Hodgkin's disease. Find out more in this article for kids.

Check out our cancer glossary for lots of easy-to-read definitions.