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  • Heart and Circulatory System for Teens


    The heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the body's tissues.

  • Echocardiogram for Teens


    An echocardiogram (also called an echo or cardiac ultrasound) uses sound waves to create pictures of the heart. See why doctors might order this test for teens.

  • Hypertension (High Blood Pressure) for Teens


    High blood pressure, also called hypertension, is more common in adults, but it can happen at any age. Learn what it is and how to treat it.

  • Why Exercise Is Wise for Teens


    Getting the right amount of exercise can rev up your energy levels and even help you to feel better emotionally. Find out why.

  • Cholesterol for Teens


    Cholesterol is a type of fat found in your blood. The body needs some cholesterol, but too much can be a problem. Discover more about cholesterol.

  • Blood for Teens


    Find out about the mysterious, life-sustaining fluid called blood.

  • EKG (Video) for Teens


    This video shows what it's like to have an electrocardiogram (EKG for short).

  • Study Drugs for Teens


    Some people use certain medicines without a prescription because they think these meds help with focus and concentration. If you've heard of "study drugs" and wonder if there are any risks, find out in this article for teens.

  • Amphetamines for Teens


    Amphetamines are stimulants that speed up brain and body functions. Find out how these drugs can affect you in this article for teens.

  • About the Body Basics Library for Teens


    Did you ever wonder what all those complex body systems do? Use this medical library to find out about basic human anatomy, how it all functions, and what happens when things go wrong.