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CXC · CSEC · Human and Social Biology

Pulmonary and systemic circulation
Practice Questions

20 CXC CSEC Human and Social Biology questions on Pulmonary and systemic circulation, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Pulmonary and systemic circulation.

Try 2 sample questions on Pulmonary and systemic circulation

Question 1 · 1 mark · Difficulty 1/3

Which blood vessel carries oxygenated blood from the lungs to the heart?

  1. A. Pulmonary artery
  2. B. Pulmonary vein
  3. C. Vena cava
  4. D. Aorta
Show answer & explanation
✓ Answer: BB. Pulmonary vein
The pulmonary vein carries oxygenated blood from the lungs back to the left atrium of the heart. This is an exception to the general rule that veins carry deoxygenated blood. The pulmonary artery, by contrast, carries deoxygenated blood from the right ventricle to the lungs.
Question 2 · 1 mark · Difficulty 1/3

In the systemic circulation, where does gas exchange between the blood and body tissues occur?

  1. A. Arteries
  2. B. Veins
  3. C. Capillaries
  4. D. Arterioles
Show answer & explanation
✓ Answer: CC. Capillaries
Gas exchange occurs in the capillaries because their walls are only one cell thick, allowing oxygen and carbon dioxide to diffuse easily between the blood and surrounding tissues. Arteries and veins have walls that are too thick for efficient diffusion. Arterioles regulate blood flow into capillary beds but are not the primary site of exchange.
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CXC CSEC Human and Social Biology: Pulmonary and systemic circulation FAQ

How many CXC CSEC Human and Social Biology questions on Pulmonary and systemic circulation are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Pulmonary and systemic circulation for CXC CSEC Human and Social Biology, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Human and Social Biology?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Pulmonary and systemic circulation practice with other Human and Social Biology topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Pulmonary and systemic circulation questions aligned to the official CXC CSEC Human and Social Biology syllabus?
Every question is written against the published CXC CSEC Human and Social Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Pulmonary and systemic circulation typically tested on CXC CSEC Human and Social Biology papers?
Pulmonary and systemic circulation appears across multiple question types on real CXC CSEC Human and Social Biology papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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