We all have different blood types because of invisible markers on our red blood cells. These markers come from special instructions passed down from parents to kids, like a recipe for making blood. Some people have one type of marker, others have another, and that’s why we can’t always share blood with each other.
Examples
- If you have type B blood and receive a transfusion from someone with type A, your body might attack their red blood cells like they’re invaders.
- A baby born to an Rh-negative mother and an Rh-positive father can develop a serious condition called hemolytic disease of the newborn.
- People with type O blood are often called universal donors because their blood lacks both A and B antigens.
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See also
- Why Do People Have Different Blood Types?
- Why Do People Have Different ‘Blood Types’ and What Does It Mean?
- What Causes ‘Fingerprints’ and Why Are They Unique?
- What Causes the ‘Flu’ and How Is It Different From a Common Cold?
- How Do Bacteria Evolve So Quickly?
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