OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Get ready for the OCR GCSE Biology exam with our comprehensive quiz, featuring flashcards and multiple choice questions. Understand the exam format, key topics, and effective study strategies to excel.

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What transports oxygenated blood from the lungs to the heart?

Aorta
Pulmonary artery
Pulmonary vein
Vena cava

The correct answer is: Pulmonary vein

The pulmonary vein is responsible for transporting oxygenated blood from the lungs to the heart. After oxygen is exchanged in the alveoli of the lungs, the oxygen-rich blood is collected by the pulmonary veins, which then funnel this blood into the left atrium of the heart. This is a crucial step in the circulatory system, as it allows the body to receive fresh oxygen needed for cellular processes. In contrast, other options serve different functions: the aorta carries oxygenated blood away from the heart to the rest of the body, the pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation, and the vena cava brings deoxygenated blood from the body back to the heart.