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

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Which of the following are the chambers of the heart?

Left atria and right ventricle
Left atria, right atria, left ventricle, right ventricle
Left ventricle and right atria
Only left and right atria

The correct answer is: Left atria, right atria, left ventricle, right ventricle

The correct answer identifies all four chambers of the heart: the left atrium, right atrium, left ventricle, and right ventricle. Understanding the heart's structure is crucial, as it plays a central role in the circulatory system. The left atrium receives oxygenated blood from the lungs and passes it into the left ventricle, which pumps it out to the rest of the body. Conversely, the right atrium receives deoxygenated blood returning from the body and conveys it to the right ventricle. The right ventricle then sends this deoxygenated blood to the lungs for oxygenation. Recognizing that all four chambers work together efficiently for proper blood circulation reinforces the understanding of cardiac function and the importance of each chamber.