AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
The four chambers of the human heart are: right atrium, right ventricle, left atrium, and left ventricle.
The textbook clearly states that the heart has different chambers to prevent mixing of oxygenated and deoxygenated blood. For a 1-mark question, simply naming all four chambers in one line is sufficient — no further description needed. Remember: upper chambers = atria (right and left); lower chambers = ventricles (right and left).