Ace AQA AS Biology 2025 – Dive In and Discover Your Inner Biologist!

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How do the left and right sides of the heart function in the circulatory system?

The left side pumps deoxygenated blood while the right side pumps oxygenated blood

Both sides pump deoxygenated blood

The left side pumps oxygenated blood to the body, while the right side pumps deoxygenated blood to the lungs

The correct answer emphasizes the distinct roles of the left and right sides of the heart in the circulatory system. The left side of the heart is responsible for pumping oxygenated blood, which has just been enriched with oxygen in the lungs, to the rest of the body. This is crucial because the organs and tissues require oxygen to function effectively.

Meanwhile, the right side of the heart receives deoxygenated blood that has returned from the body, where it has delivered oxygen and collected carbon dioxide. The right side then pumps this deoxygenated blood to the lungs, where it can release carbon dioxide and take up oxygen again. This cycle is essential for maintaining the flow of oxygen-rich blood throughout the body and ensuring that carbon dioxide is expelled.

This division of labor allows for efficient circulation and oxygenation, highlighting the heart's role as a dual pump working in tandem to sustain life.

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The right side receives blood returning from the body while the left side sends it to the lungs

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