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They are called capillaries and are involved in the process of capillary exchange where they supply each living cell in your body with the nutrients it needs to survive and also carries away their waste products. The tiniest tubes are the capillaries.

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16y ago
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11y ago

They are called Capillaries.

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Anonymous

Lvl 1
3y ago

ion know if it is right , But I think it is CAPILLARIES

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Q: What are the tiniest tubes in the circulatory system called?
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