Red Blood Cells, transports oxygen from the lungs to the rest of the body, White Blood Cells, part of the immune system, help protect the body from foreign invaders and infectious diseases, Regulatory Cells, regulate the immune system's response to foreign substances, regulating or suppressing other cells in the immune system, Helper Cells, essential to the body's adaptive immune system, activate other immune cells to fight infections, Killer T Cells, can destroy certain cells, including cancer cells, foreign cells, and cells infected with viruses, also known as Cytotoxic T cells, Platelets, travel to the injured area and clump together to form a clot, clot acts as a plug, sealing the blood vessel and preventing excess blood from leaving the body

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