Veins do not need thick walls like arteries mainly because:
Question
Veins do not need thick walls like arteries mainly because:
They carry less blood
Blood in veins is no longer under high pressure
They are located deeper in the body
They carry only lymph
Answer
Blood in veins is no longer under high pressure
Detailed Explanation
Since blood returning through veins is no longer under high pressure, veins do not need thick walls, though they do have valves to prevent backflow. — Examisthan.com