Which statement about arteries and veins is true?

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Build your vocabulary for the IGCSE Coordinated Science Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Prepare for success!

Multiple Choice

Which statement about arteries and veins is true?

Explanation:
Arteries carry blood away from the heart because the heart’s pumping action pushes blood into them at high pressure, so they need thick, elastic walls to withstand that force and keep blood moving onward to tissues. Veins, on the other hand, return blood to the heart at lower pressure and have thinner walls with valves to prevent backflow as the body loads blood back toward the heart. So the true statement is that arteries carry blood away from the heart. The other ideas don’t fit: veins don’t carry blood away, arteries don’t have thinner walls, and arteries don’t carry blood toward the heart.

Arteries carry blood away from the heart because the heart’s pumping action pushes blood into them at high pressure, so they need thick, elastic walls to withstand that force and keep blood moving onward to tissues. Veins, on the other hand, return blood to the heart at lower pressure and have thinner walls with valves to prevent backflow as the body loads blood back toward the heart. So the true statement is that arteries carry blood away from the heart. The other ideas don’t fit: veins don’t carry blood away, arteries don’t have thinner walls, and arteries don’t carry blood toward the heart.

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