What Is the Digestive System? The digestive system breaks down the food we eat into tiny parts to give us fuel and the nutrients we need to live. As food breaks down, we get amino acids from protein, ...

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 ...

How much do you know about the urinary system, which makes pee? Find out by taking this quiz!

Sounds are everywhere, and you have two cool parts on your body that let you hear them all: your ears! The outer ear is made up of the pinna — also called the auricle (say: OR-ih-kul) — and the ear ...

What Is the Digestive System? Food is our fuel, and its nutrients give our bodies' cells the energy and substances they need to work. But before food can do that, it must be digested into small pieces ...

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 ...

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 ...

What Is Gastroesophageal Reflux (GER)? Gastroesophageal reflux (GER), also called reflux, is when food and acid from the stomach go back up into the esophagus. This causes an uncomfortable feeling in ...

What Are the Lungs and Respiratory System? The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out ...

Why Is Hand Washing So Important? It's a message worth repeating — hand washing is by far the best way to keep kids from getting sick and prevent the spread of germs. When kids have contact with germs ...

Fatty acids are the building blocks of the fat in our bodies and in the food we eat. During digestion, the body breaks down fats into fatty acids, which can then be absorbed into the blood. Fatty acid ...

What Does the Brain Do? And What Does the Nervous System Do? If you've ever wondered how your brain and nervous system work, this movie has the answers!