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.

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 male reproductive system is made up of the parts inside and outside a male’s body that help make a baby. Learn about them and how they work.

Symptoms, inhaler, tonsillectomy — what do all those medical words mean? Check out our easy-to-read definitions.

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

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 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 ...

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 ...

Find out what you can do if you think you or a friend has a drug or alcohol addiction - from recognizing the warning signs to suggestions to help you stay clean.

Head lice are tiny wingless insects. They live among human hairs and feed on blood from the scalp. Head lice are a common problem, especially for kids. They spread easily from person to person, and ...

How Does the Digestive System Work? So there you are, sitting at lunch, enjoying some grilled-chicken pizza and a few orange wedges. When you're finished, you take a last drink of milk, wipe your ...

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