Question 5(b)
Topic:
12 Marks
Name the four chambers of the human heart and their functions.
Official Marking Scheme & Model Answer
Model Answer / Key
The heart consists of the Right Atrium, Right Ventricle, Left Atrium, and Left Ventricle. The left side handles oxygenated blood, with the left ventricle being the thickest chamber as it pumps blood to the entire systemic circulation.
Examiner's Explanation
Focus on key biological terms like "emulsification", "turgidity", and "deoxygenated" to secure maximum marks.
Mark Allocation Criteria
- Right Atrium: Receives deoxygenated blood from the body
- Right Ventricle: Pumps deoxygenated blood to the lungs
- Left Atrium: Receives oxygenated blood from the lungs
- Left Ventricle: Pumps oxygenated blood to the rest of the body
- Mention of heart valves (tricuspid and bipal) for extra marks