nikjon9952
nikjon9952 nikjon9952
  • 10-03-2021
  • Social Studies
contestada

Arteries are thicker than veins. Veins are thin and have valves so the blood doesn't flow backwards when it returns to the heart. ​

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kedelynsantana
kedelynsantana kedelynsantana
  • 10-03-2021

Answer:good to know

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