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HomeCXC CSEC BiologyHuman Circulatory System: Structure and Function of the Heart
CXC · CSEC · Biology

Human Circulatory System: Structure and Function of the Heart
Practice Questions

20 CXC CSEC Biology questions on Human Circulatory System: Structure and Function of the Heart, each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 1/3

A nurse at the Port of Spain General Hospital is taking a patient's pulse. Which blood vessel is she most likely pressing to feel the pulse?

  1. Vein
  2. Artery
  3. Capillary
  4. Lymph vessel
Show answer & explanation
✓ Answer: BArtery
Award 1 mark for identifying that arteries carry blood away from the heart under high pressure, creating a pulse. A is incorrect — veins have low pressure and no detectable pulse. C is incorrect — capillaries are too small and have very low pressure. D is incorrect — lymph vessels carry lymph, not blood.
Question 2 · 1 mark · Difficulty 1/3

Which chamber of the heart pumps oxygenated blood to the rest of the body?

  1. Right atrium
  2. Right ventricle
  3. Left atrium
  4. Left ventricle
Show answer & explanation
✓ Answer: DLeft ventricle
Award 1 mark for identifying that the left ventricle pumps oxygenated blood through the aorta to the systemic circulation. A is incorrect — the right atrium receives deoxygenated blood from the body. B is incorrect — the right ventricle pumps deoxygenated blood to the lungs. C is incorrect — the left atrium receives oxygenated blood from the lungs but does not pump it to the body.
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CXC CSEC Biology: Human Circulatory System: Structure and Function of the Heart FAQ

How many CXC CSEC Biology questions on Human Circulatory System: Structure and Function of the Heart are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Human Circulatory System: Structure and Function of the Heart for CXC CSEC 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 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 Human Circulatory System: Structure and Function of the Heart practice with other 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 Human Circulatory System: Structure and Function of the Heart questions aligned to the official CXC CSEC Biology syllabus?
Every question is written against the published CXC CSEC 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 Human Circulatory System: Structure and Function of the Heart typically tested on CXC CSEC Biology papers?
Human Circulatory System: Structure and Function of the Heart appears across multiple question types on real CXC CSEC 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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