Every child feels lonely now and then. But kids can feel better when parents work with them to practice skills that help with bonding, belonging, and feeling close to others. These are called social ...

Nutrition is the study of food and how it works in your body. Nutrition includes all the stuff that's in your food, such as vitamins, protein, fat, and more. It's important to eat a variety of foods, ...

Did you know you have more than 600 muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while ...

We see and hear about hearts everywhere. A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Now ...

What Does the Heart & Circulatory System Do? If you've ever wondered how your heart works, this movie has the answer. And special thanks to the Fred J. Brotherton Charitable Foundation for supporting ...

How Does the Brain Work? And How Does the Nervous System Work? How do you remember the way to your friend's house? Why do your eyes blink without you ever thinking about it? Where do dreams come from?

How Does Air Enter the Respiratory System? Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs ...

Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by vertebrae, a set of ring-shaped bones. They're both cushioned by layers of ...

Girls have lots of questions about the body changes of puberty. When will my breasts grow? What's the "normal" age to get your first period? Watch this video and find out!

Pinworms are tiny worms that can cause an infection in the intestines. Pinworm infections affects millions of people each year, especially school-age kids If your child develops a pinworm infection, ...

All newborns cry and get fussy sometimes. It's normal for a baby to cry for 2–3 hours a day for the first 6 weeks. During the first 3 months of life, they cry more than at any other time. New parents ...

It’s normal for people to masturbate (touch or rub their own genitals because they like the way it feels). Some people do it to relieve stress or tension. It’s nothing to be ashamed of or embarrassed ...