Question

Select the incorrect statement:.
(a) The arteries have thick, elastic walls
(b) The veins have thin walls
(c) Veins have valves to ensure that blood flows in one direction only.
(d) Arteries have valves to ensure that blood flows in one direction only.​

Answer 1

Arteries have valves to ensure that blood flows in one direction only.

Explanation:

Arteries : They carry the oxygenated blood from the heart to the different body parts. blood emerges from the heart under high pressure. In order to withstand this pressure, arteries have thick and elastic walls. Arteries do not require valves because pressure from the heart is so strong that blood is only able to flow in one direction.

Veins : They have low pressure, As they have low pressure , they have thin walls. Veins contains valves that ensure the blood flows in only one direction.