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Blood Types

Blood Types

Author: Aaron Mullally

This lesson will identify and describe the four main blood types.

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Terms to Know

The high class term for clumping.


Specific protein markers that are created by the immune system for binding and reacting to specific antigens.


A unique marker on the surface of a cell that can stimulate an immune response.

Universal Donor

The blood type O; type O blood contains no surface antigens so there is nothing for the immune system to reject.

Universal Recipient

The blood type AB; type AB blood contains both A & B surface antigens which means that a person with this blood type won’t have any A or B antibodies in their blood.