Arteries have thick, elastic walls to withstand and maintain high pressure from blood pumped by the heart. Veins carry blood at lower pressure, so they contain valves to prevent backflow and ensure unidirectional movement.
sample paper for class 10 science board exam 2026
class 10 science board exam paper 2026
Arteries transport blood from the heart under high pressure, so they need thick and elastic walls to resist and maintain this pressure without damage. In contrast, veins carry blood back to the heart at low pressure. To prevent blood from flowing backwards due to gravity, veins are provided with valves. Thus, arteries manage pressure, while veins ensure correct direction of blood flow.