Why do we have blood and what does it do?
But Why: A Podcast for Curious Kids
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The Different Types of Blood
The most common blood type in the world is O positive with A positive not too far behind. The rarest blood type is A B negative. Do you know what blood type you are? In our next episode we'll actually go to a blood donation center where people have blood taken out of their bodies to give to someone else who needs it.
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