Why do humans have different blood types?

Have you ever wondered why you can't donate blood to just anyone? The answer lies in the fascinating world of blood types. Imagine your blood as a unique cocktail, with special markers that set it apart from others. These markers, or antigens, are like secret handshakes between your blood cells and your immune system. But here's the twist: not everyone's handshake is the same. Some people have A, others B, some AB, and then there's the universal donor, O. This diversity isn't just a quirk of nature; it's a testament to our evolutionary journey and the body's incredible defense mechanisms. Join us as we dive into the captivating story behind human blood types and unravel the mysteries that flow through our veins.

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