The nose, throat, and lungs are just a few parts of the body that make up the respiratory system. They work together to bring oxygen into the body and take carbon dioxide (a waste product) out.

Coughing is a healthy reflex that helps clear the airways. A severe cough or one that lasts more than a week requires a medical checkup. But many coughs are caused by a virus that just needs to run ...

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.

Before having sex, it’s important to know about birth control and protecting against unplanned pregnancy and sexually transmitted diseases (STDs).

Cramps can put a crimp in a girl's daily routine. Find out what period cramps are and how to handle 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 ...

Your brain is the boss of your body and runs the whole show. Learn more in this article for kids.

Everybody knows that some organs in the human body are necessary for survival: you need your brain, your heart, your lungs, your kidneys... KIDNEYS? Absolutely. Even though you won't find a ...

What Is an Umbilical Hernia? An umbilical hernia happens when part of a child's intestines bulges through the abdominal wall inside the belly button. It shows up as a bump under the belly button. The ...

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.

Take this quiz about the urinary system, the system that produces pee.

These bacterial infections can cause diarrhea, cramping, belly pain, and fever. Good hand-washing and food safety habits can help prevent them.