A working model represents the human double circulatory system. Liquid follows this route:
right-side pump → lung network → left-side pump → body network → right-side pump
Both pumps operate at 70 beats per minute. The proposed settings are shown in the table.
| Pump | Stroke volume (cm3 beat−1\mathrm{cm^3\,beat^{-1}}cm3beat−1) | Peak pressure (mmHg\mathrm{mmHg}mmHg) |
|---|---|---|
| Right-side | 72 | 100 |
| Left-side | 60 | 30 |
Evaluate whether the proposed settings correctly represent the human double circulatory system. Use calculations in your answer.
67 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.