How does the four-chambered human heart help meet the body's energy requirement better?
Answer and explanation
Correct answer: It keeps oxygenated and deoxygenated blood separate
The governing concept is separation of oxygenated and deoxygenated blood in double circulation. The right side sends oxygen-poor blood to the lungs, while the left side pumps oxygen-rich blood to the body at good pressure. This supports efficient aerobic respiration and greater energy release in cells. Therefore option A is correct; the other options confuse circulation with digestion, excretion, or lung function.
Frequently asked questions
What is the correct answer to this question?
It keeps oxygenated and deoxygenated blood separate
Why is this the correct answer?
The governing concept is separation of oxygenated and deoxygenated blood in double circulation. The right side sends oxygen-poor blood to the lungs, while the left side pumps oxygen-rich blood to the body at good pressure. This supports efficient aerobic respiration and greater energy release in cells. Therefore option A is correct; the other options confuse circulation with digestion, excretion, or lung function.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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