Biology, asked by 017harmankaur, 5 months ago

3. Which one is not correct about veins?
(a) Veins are thick-walled
(b) Veins have valves to maintain
unidirectional blood flow
(c) Veins are collecting vessels
(d) Blood in veins flows towards heart​

Answers

Answered by Anonymous
6

Answer:

Veins are thick walled

Answered by gayatrimdere
4

Answer:

a option is wrong because veins are never thick walled..only arteries are thick walled

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