About Blood Cells
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White Cells Defend the Body
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Platelets Help Control Bleeding
Platelets are small cells in the blood that control bleeding. They form clusters to plug small holes in blood vessels and assist in the clotting process.
More About Blood
- Blood History
- Blood Cells
- Blood Safety
- Needing Blood
Blood
Cells are Produced in Bone Marrow
Red
Cells Deliver Oxygen
White
cells are the body's primary defense against infection. They can move out of the blood stream and reach
tissues being invaded. 