Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

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7 grade science> Veins have valves which allow blood to fl...

Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

Harshit Singh , 3 Years ago

Pawan Prajapati

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I have to download the pdf of notes but I can't please tell me that how I can download the pdf

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7 grade science> Veins have valves which allow blood to fl...

Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

Harshit Singh , 3 Years ago

Pawan Prajapati

LIVE ONLINE CLASSES

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