Question

Choose the correct statement that describes the arteries.

• A. They have thick elastic walls, blood flows under high pressure, collect blood from different organs and bring it back to the heart.
• B. They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body.
• C. They have thick elastic walls, blood flows under low pressure and carry blood from the heart to various organs of the body.
• D. They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.

Answer 1

Answer: (D)

They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.

As blood is pumped directly into arteries by heart, the pressure is high which helps in distributing oxygen rich blood to all body parts. Hence, arteries should have thick elastic walls to sustain the pressure and do not require valves. Valves are present in veins to prevent backflow of the blood.

So, the correct answer is option D.