CDS 2026 (I) General Knowledge, question 7

Topic: Biology

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Q7

In humans, which chamber of the heart receives oxygen-rich blood from the lungs first ?

  1. (a) Left atriumCorrect answer
  2. (b) Right atrium
  3. (c) Left ventricle
  4. (d) Right ventricle

Solution.

Answer: (a) Left atrium

  1. Pulmonary veins bring oxygenated blood from the lungs into the left atrium.
  2. It then passes to the left ventricle before entering systemic circulation.