A student in Barbados is studying heart structure and notices that the left ventricle has a thicker muscular wall than the right ventricle. What is the reason for this difference?

Q: How do I try a free CXC Biology question?

Just tap any of the four options on this page — no signup, no card, nothing to install. You'll see the correct answer and a full mark-scheme-style explanation within a second. Each visit shows a fresh randomly-picked question from the live CXC CSEC Biology bank, so you can keep refreshing to try different ones before deciding whether to create a free account for daily access.

Q: Is Kramizo really free for CXC Biology students?

Yes — completely free. Every student gets 45 questions a day on the free plan, across any board and any subject, with no card required and no trial countdown. Kramizo's optional Pro plan removes the daily cap and adds analytics, but the free plan is genuinely free forever. We make money from the small percentage of students who choose to upgrade — not from selling data or ads.

Q: Are the Biology questions aligned to the CXC CSEC syllabus?

Every question is written against the published CXC CSEC Biology syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real CXC past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

Question

A student in Barbados is studying heart structure and notices that the left ventricle has a thicker muscular wall than the right ventricle. What is the reason for this difference?

Accepted Answer

The left ventricle must pump blood at higher pressure to reach all body tissues — Award 1 mark for linking wall thickness to the need for greater force to pump blood through the systemic circulation. A is incorrect — receiving blood does not require thick walls. B is incorrect — the right ventricle pumps to the lungs. D is incorrect — both ventricles pump the same volume of blood per beat.

Answer

The left ventricle must pump blood to the lungs only

Answer

The left ventricle contains more blood than the right ventricle

Answer

The left ventricle receives blood from the lungs

Answer

The left ventricle must pump blood at higher pressure to reach all body tissues

One real Biology question.No signup. 30 seconds.

One real Biology question.
No signup. 30 seconds.