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Lymphocytes. They need to stick around as memory to fight reoccuring infections.

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11y ago
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8y ago

The plasma (the straw-coloured fluid that the other cells 'float' in). Plasma can be kept frozen for months - the red/white cells & platelets can only survive frozen for a few weeks.

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11y ago

WBC

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Q: Which part of blood has the longest life span?
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