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  • Blood for Teens


    Learn what blood is, what it does, what the different kinds of blood cells are, and how blood travels through the body.

  • Blood Test: Complete Blood Count for Parents


    The complete blood count (CBC) is the most common blood test. It analyzes red blood cells, white blood cells, and platelets.

  • Donating Blood for Teens


    There's a 97% chance that someone you know will need a blood transfusion. Blood donors — especially donors with certain blood types — are always in demand. Find out what's involved in this article for teens.

  • Blood Types for Teens


    Learn why blood is grouped into types, what the types and blood components are, and why blood transfusions matter.

  • What's Blood? for Kids


    Blood swirls through your veins and arteries, but what is it really? Find out about blood in this article for kids.

  • Blood Culture for Parents


    A blood culture is a test that looks for germs (such as bacteria or fungi) in the blood.

  • Blood Transfusions for Teens


    Millions of people a year get blood transfusions in the United States. This article explains why people need them and who donates the blood used.

  • Blood Transfusions for Parents


    A blood transfusion is a safe and relatively simple medical procedure that replaces blood lost during surgery or because of an injury or illness.

  • Blood in the Urine (Hematuria) for Parents


    If there's blood in your child's pee, don't panic. Most of the time it's not serious. Find out what causes it and what to do about it.

  • Testosterone Blood Test for Parents


    Testosterone blood tests can check for things like early or late puberty, testicle and ovary problems, and steroid use.