MDCAT Biology — Circulation
Circulation is a core Biology topic in the PMDC MDCAT syllabus, covering 9 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (9)
- Blood
- Blood Composition and Cells
- Blood Vessels
- Blood Vessels (Arteries, Veins, Capillaries)
- Cardiac Cycle and Phases of Heartbeat
- Heart
- Human Heart
- Human Physiology - Circulation
- Lymphatic System
How Circulation is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Circulation accounts for 45 questions. It appears in 14 of them, about 3.2 questions a paper. The heaviest was MDCAT 2018, with 6 questions, and the most recent is MDCAT 2025, with 3.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 3 |
| MDCAT 2023 | 2 |
| MDCAT 2022 | 2 |
| MDCAT 2019 | 2 |
| MDCAT 2018 | 6 |
| MDCAT 2017 | 4 |
| MDCAT 2016 | 4 |
| MDCAT 2015 | 5 |
| MDCAT 2014 | 1 |
| MDCAT 2013 | 3 |
| MDCAT 2012 | 3 |
| MDCAT 2011 | 4 |
| MDCAT 2010 | 3 |
| MDCAT 2009 | 3 |
Circulation MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Circulation
The first consequence of lymphatic blockage in tissues is:
- A.Deficiency of oxygen
- B.Loss of nerve signals
- C.Drop in blood pressure
- D.Excess fluid accumulation in tissue
Show answer
Answer: D. Excess fluid accumulation in tissue — Blocked lymph drainage first causes fluid buildup (edema) in tissues.
- Q2 · MDCAT 2023 · Circulation
Descending aorta is bifurcated into two vessels which on further division from femoral artery supply blood to high muscles of legs:
- A.Iliac vein
- B.Iliac artery
- C.Temporal artery
- D.Sciatic artery
Show answer
Answer: B. Iliac artery — The iliac artery (via its femoral artery continuation) is the vessel that supplies blood to the leg muscles.
- Q3 · MDCAT 2022 · Circulation
The lymphatic vessels of the body empty the lymph into blood stream at?
- A.Abdominal vein
- B.Jugular vein
- C.Subclavian vein
- D.Bile duct
Show answer
Answer: C. Subclavian vein — Lymphatic vessels empty lymph back into the bloodstream at the subclavian veins.