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 ...

Now that you don’t have to be in a booster seat anymore, there are some things to know about staying safe in cars. There’s also stuff you can do to stay safe when you ride the bus — and get on and off ...

Life has changed now that your baby is here, and you might have lots of questions about what to do. These tips can help first-time parents feel confident about caring for a newborn in no time. An ...

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 ...

To help your child get ready for a blood test, find out if they need to fast (not eat or drink) or should stop taking medicines before the test. Explain what to expect during the test. If your child ...

What Is the Respiratory System? When we breathe, the respiratory system takes in oxygen and sends out carbon dioxide. The cells in our bodies need fresh oxygen to stay alive. As cells do their jobs, ...

Click through this slideshow to learn more about the kidneys and urinary tract. The bean-shaped kidneys filter waste products out of the bloodstream and dispose of them by creating urine. Urine is ...

You might go to the hospital if you fall off your bike and break your arm or if you have asthma and have trouble breathing. You might go to the hospital if you become dehydrated and need IV fluids or ...

Histamine - a chemical found in some of the body's cells - causes many of the symptoms of allergies, such as a runny nose or sneezing. When a person is allergic to a particular substance, such as a ...

What Is a Cardiac Catheterization? A cardiac catheterization is a procedure that cardiologists (heart doctors) do. They put a catheter (a long, thin tube) into a blood vessel, then guide it the heart.

The foods we eat contain nutrients that provide energy and other substances the body needs. Most of the nutrients in food fall into three major groups: proteins, fats, and carbohydrates. The body uses ...

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 ...