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

Question: 1 / 1090

Which part of the heart receives deoxygenated blood from the body?

Left atrium

Right atrium

The right atrium is the chamber of the heart that receives deoxygenated blood from the body. This blood returns to the heart through two major veins: the superior vena cava and the inferior vena cava. The superior vena cava carries blood from the upper body, while the inferior vena cava brings blood from the lower body. Once the right atrium fills with deoxygenated blood, it then contracts to push this blood into the right ventricle, which subsequently pumps it to the lungs for oxygenation.

In contrast, the left atrium receives oxygenated blood from the lungs, and the left ventricle pumps this oxygen-rich blood to the rest of the body. The right ventricle is responsible for sending deoxygenated blood to the lungs but does not receive it directly from the body; instead, it gets blood from the right atrium. Understanding the flow of blood through these chambers is crucial for grasping the overall functioning of the circulatory system.

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Left ventricle

Right ventricle

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