Question

(d) Veins have different structures from arteries.

Answer 1

here's the solution,

Feature 1 : -

veins have thin walls as compared to arteries.

Explaination 1 : -

veins have thin walls, because they have less blood pressure in comparison to arteries and hence.

Feature 2 : -

veins have valves

Explanation 2 : -

veins have valves to stop backflow of blood.