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Understanding Blood Groups: Types A, B, AB, and O

Blood groups are categorized into four main types: A, B, AB, and O, determined by specific proteins known as antigens present on red blood cells (RBCs). Type A has the "A" antigen, Type B has the "B" antigen, Type AB contains both antigens, while Type O has neither. These antigens play a crucial role in how your immune system recognizes and responds to foreign substances. Understanding your blood type is essential for safe blood transfusions and overall health.

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Understanding Blood Groups: Types A, B, AB, and O

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  1. Blood Groups • 4 types: A, B, AB ,and O. • Differ by a specific protein on RBC called an antigen (molecule that can be recognized by your immune system)

  2. Antigens on RBCs • A: has antigen “A” on RBCs. • B: has antigen “B” on RBCs. • AB blood has both antigens. • O has neither proteins.

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