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Subject :NCO    Class : Class 7
What is the use of valves in veins?

Ans 1:

Class : Class 8
TO STOP THE BLOOD FROM FLOWING BACK

Ans 2:

Class : Class 7
valves prevent the backflow of blood in veins as the blood is flowing with slow speed

Ans 3:

Class : Class 7
It acts as a preventer which doesn't allows blood to flow back

Ans 4:

Class : Class 8
TO STOP THE BLOOD FROM FLOWING BACK

Ans 5:

Class : Class 7
it prevents the blood from flowing backwards!!!

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