Question

WHY DO ARTERIES HAVE THICK ELASTIC WALLS WHERE AS THE VEINS HAVE THIN WALLS ?

Answer 1

Arteries have thick walls because the blood in them rushes at high pressure and because of the high pressure it could break the walls so as to avoid that from happening they have thick walls.

Veins have thin walls because the blood pressure or the rate at which the blood flows is much lower than in arteries and veins have thin walls also so that the can widen to allow more blood through so basically they are stretchable.

Answer 2

Because blood flows into arteries in greater pressure