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Science · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 1 · Q12
Briefly mention the steps in double-circulation through human heart.
Briefly mention the steps in double-circulation through human heart.
Marking-scheme solution
Oxygenated blood from lungs comes to left atrium which pushes it to left ventricle →
Left ventricle contracts to push blood into aorta, to be sent to body parts →
Deoxygenated blood from body parts is collected and sent to right atrium →
Right atrium pushes it to right ventricle, to be sent to lungs for oxygenation.
CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.