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  • Can You Use Two Condoms for Extra Protection? for Teens


    Using two condoms actually offers less protection than using just one. Here's why.

  • 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.

  • Male Reproductive System for Teens


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

  • Female Reproductive System for Teens


    Why do girls get periods? What goes on when a woman gets pregnant? What can go wrong with the female reproductive system? Find the answers to these questions and more in this article for teens.

  • Kidneys and Urinary Tract for Teens


    The kidneys perform several functions that are essential to health, the most important of which are to filter blood and produce urine.

  • Comminuted Fractures for Teens


    A comminuted fracture is a type of broken bone. The bone is broken into more than two pieces.

  • Serious Allergic Reactions (Anaphylaxis) for Teens


    A person with severe allergies can be at risk for a sudden, serious allergic reaction called anaphylaxis. This reaction can seem scary, but the good news is it can be treated.

  • Milk Allergy for Teens


    Milk is in all kinds of foods, even things like baked goods. So what should a person who's allergic to milk do?

  • Female Reproductive System (Slideshow) for Teens


    This slideshow explains how the female reproductive system works.

  • Brain and Nervous System for Teens


    If the brain is a central computer that controls all the functions of the body, then the nervous system is like a network that relays messages back and forth to different parts of the body. Find out how they work in this Body Basics article.