The digestive process starts even before the first bite of food. Find out more about the digestive system and how our bodies break down and absorb the food we eat.

A "popped" eardrum is more than just painful - it can sometimes lead to hearing loss. Learn about ruptured eardrums and how to prevent them.

What Does the Heart Do? The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After ...

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

What Do Teeth Do? You bite into an apple and then try to start talking to your friend about yesterday's math homework. Suddenly something feels funny — one of your baby teeth has fallen out! It's been ...

Herd immunity is when many people are immune to a contagious infection, so it's harder for that infection to spread in a community. Learn more.

I know that at some point kids should drink nonfat milk as part of a low-fat diet. But what's the right age to switch kids from whole milk to nonfat milk? – Sheila Breast milk is the food of choice ...

It’s normal for people to masturbate. Some people do it to relieve stress or tension. It’s nothing to be ashamed of or embarrassed about.

What makes up a guy's reproductive system and how does it develop? Find the answers to these questions and more.

Learn which nutrients you need while pregnant or breastfeeding, and easy ways to add them to your diet.

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.

Lead is a metal that's found in the environment and many consumer products. It can be toxic (poisonous) to people and animals. Lead poisoning happens when too much lead gets into the body. In kids, ...