Engineers compare three designs for an artificial heart. Each design has an internal wall between its right and left pumping chambers. The engineers test the designs under the same conditions.
The table shows the oxygen concentrations measured in blood entering the aorta from the left pumping chamber and in blood entering the pulmonary artery from the right pumping chamber.
| Prototype | Oxygen concentration in blood entering the aorta (cm3 per 100 cm3 of blood) | Oxygen concentration in blood entering the pulmonary artery (cm3 per 100 cm3 of blood) |
|---|---|---|
| A | 19.2 | 14.8 |
| B | 18.0 | 16.0 |
| C | 17.1 | 16.9 |
Use the data to explain which prototype has an internal wall that performs the same function as the septum most effectively. Suggest how using this prototype rather than prototype C would affect the oxygen supplied to body cells.
304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.