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Topic Circulatory system
Asked 9 times across 2 UPSC exams over 12 years (2014–2026), peaking in 2021.
Key insights
- Most tested in CDS — 8 of 9 PYQs
- Most asked in 2021
- Recurs across 7 years (2014–2026)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2014 → GEO 2021
How the concept evolved
Rising — more than half its appearances (8 of 9) are since 2016.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2026
In humans, which chamber of the heart receives oxygen-rich blood from the lungs first ?
- A Left atrium ✓
- B Right atrium
- C Left ventricle
- D Right ventricle
✓ Correct answer: (A)
Science & Technology › Biology & Health
CDS2024
Pulse is felt due to the rhythmic contraction and relaxation of the
- A chambers of heart
- B valves present in veins
- C aorta and main arteries ✓
- D valves of heart
✓ Correct answer: (C)
Science & Technology › Biology & Health
CDS2022
Match List I with List II and select the correct answer using the code given below the lists
| List I (Blood Vessel) | List II (Function) |
|---|
| A. Pulmonary artery | 1. Carries blood from lungs to heart |
| B. Capillaries | 2. Carries blood to heart muscle |
| C. Coronary artery | 3. Connection between arteries and veins |
| D. Pulmonary vein | 4. Carries blood from heart to lungs |
Codes:
- A A-4 B-3 C-2 D-1 ✓
- B A-4 B-2 C-3 D-1
- C A-1 B-2 C-3 D-4
- D A-1 B-3 C-2 D-4
✓ Correct answer: (A)
Science & Technology › Biology & Health
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