Say: blud type
Every person has a blood type. There are four major types, each with a different
chemical marker that's attached to a person's red blood cells. These markers determine
if someone has type A blood, type B blood, type O blood, or type AB blood. Each blood
type can also be positive (+) or negative (-), just to make things a little more complicated!
It's important that doctors know which blood type you have if you're going to have
surgery, just in case you need
some extra blood. But in an emergency, anyone can safely receive O-negative blood,
regardless of his or her blood type.