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If Blood Is Plasma + Blood Cells, Why Are Blood Types Different?

Life Noggin

Every schoolchild knows the structure of blood, but far not every adult knows why it has several types. Of course, we have all heard about it, but have you ever wondered how does it occur? Why do humans have all kinds of different blood types? What is A, B, AB and O all about? This video lesson of Biology will answer all of your questions on this matter.

posted by izzatoke4