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Dhananjay sharma from dps noida, ghaziabad
Subject :ICSO    Class : Class 7
What is the use of valves in veins?

Ans 1:

ayuj from Indirapuram Public School, Ghaziabad
Class : Class 7
valves prevent the backflow of blood in veins as the blood is flowing with slow speed

Ans 2:

Suchita A from PSBB Millennium, Gerugambakkam, Chennai
Class : Class 7
it prevents the blood from flowing backwards!!!

Ans 3:

RAHUL SINHA from D.A.V Public Koyla Nagar Dhanbad, dhanbad
Class : Class 7
It acts as a preventer which doesn't allows blood to flow back

Ans 4:

rohan shah from chavara public school, dhule
Class : Class 8
TO STOP THE BLOOD FROM FLOWING BACK

Ans 5:

rohan shah from chavara public school, dhule
Class : Class 8
TO STOP THE BLOOD FROM FLOWING BACK

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