Home / iGCSE Biology (0610)-9.3 Blood vessels – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-9.3 Blood vessels – iGCSE Style Questions Paper 1

IGCSE Biology (0610) Practice Questions Paper 1 - All Chapters

Question

The diagram shows the blood vessels between the lungs, heart and kidneys in a human. The arrows indicate the direction of blood flow.

Which blood vessel is labelled correctly?

(A) coronary artery
(B) pulmonary artery
(C) renal vein
(D) aorta
▶️ Answer/Explanation
To identify the correct label, we must trace the direction of blood flow. Blood vessel C is shown carrying blood away from the kidneys back toward the main vein (vena cava) leading to the heart; therefore, it is correctly identified as the renal vein. In contrast, A is the pulmonary artery (carrying blood to the lungs), B is the pulmonary vein (returning to the heart), and D is the vena cava (returning from the body), making those labels incorrect. Since vessel C matches its physiological function and direction, it is the only accurate choice.
✅ Answer: (C)

Question

Which blood vessel transports blood from the lungs to the heart?

(A) aorta
(B) pulmonary artery
(C) pulmonary vein
(D) vena cava
▶️ Answer/Explanation
In the circulatory system, “pulmonary” refers to the lungs. While most veins carry deoxygenated blood, the pulmonary vein is unique because it carries freshly oxygenated blood from the lungs back to the left atrium of the heart. Conversely, the pulmonary artery carries deoxygenated blood away from the heart to the lungs. The aorta and vena cava are part of the systemic circulation, dealing with the rest of the body rather than the gas exchange interface in the lungs. Therefore, the vessel returning to the heart from the lungs is the pulmonary vein.
✅ Answer: (C)
Question

The diagrams show sections through three blood vessels, which are not drawn to the same scale. Some red blood cells are shown in vessel 3. In which order will red blood cells flow through these vessels when travelling from the right ventricle to the left atrium of the heart?

Blood vessel sections

A) 1 → 2 → 3
B) 1 → 3 → 2
C) 2 → 3 → 1
D) 3 → 1 → 2

▶️ Answer/Explanation
Solution

Ans: B (1 → 3 → 2)

The correct sequence follows the pulmonary circulation pathway:

  1. Vessel 1: Pulmonary artery (carries deoxygenated blood from right ventricle to lungs)
  2. Vessel 3: Capillaries (site of gas exchange where RBCs become oxygenated)
  3. Vessel 2: Pulmonary vein (returns oxygenated blood to left atrium)
Blood flow diagram

Key points: The presence of RBCs in vessel 3 confirms it as capillaries, while vessel 1’s thick wall indicates an artery. Vessel 2’s thin wall matches vein characteristics.

More IGCSE Biology (0610) Practice Questions Paper 1 ...........
Scroll to Top