Describe4 marksStandard
The table below shows pressure changes in the left side of the heart during one cardiac cycle.
| Time (s) | Left atrial pressure (mmHg) | Left ventricular pressure (mmHg) | Aortic pressure (mmHg) |
|---|---|---|---|
| 0.0 | 5 | 0 | 80 |
| 0.1 | 8 | 5 | 80 |
| 0.2 | 6 | 120 | 100 |
| 0.3 | 4 | 100 | 100 |
| 0.4 | 5 | 0 | 95 |
Describe the pressure changes in the left atrium, left ventricle and aorta during the cardiac cycle in the table, and explain how these pressure changes cause the opening and closing of the atrioventricular and semilunar valves.