Ever cut yourself on the toe? How about the finger? The ear? Ever get a bloody nose? How about a scrape on the knee?

If these things have ever happened to you then you already know that blood vessels carry blood to EVERY part of the body. They start out big at the heart, then branch off into smaller and smaller tubes to reach everywhere. Take a look inside a model of blood vessels.

Quick Menu: Cardio | Intro | Heart | Lungs | Activity 1 | Blood Vessels | Activity 2