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hollieclark2013 hollieclark2013
  • 08-06-2014
  • Biology
Answered

Why don't arteries need valves

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lawrencecilia lawrencecilia
  • 08-06-2014

Arteries don't need valves because the blood that is flowing through them is at a high pressure.

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trickiwoo trickiwoo
  • 08-06-2014

the blood is always flowing through them at high pressures

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