The diagram illustrates how pressure varies in the different structures on the right side of the heart during the cardiac cycle. Which structures are shown by X, Y and Z?
- AX: pulmonary artery; Y: right atrium; Z: right ventricle
- BX: right atrium; Y: pulmonary artery; Z: right ventricle
- CX: right ventricle; Y: pulmonary artery; Z: right atrium
- DX: right ventricle; Y: right atrium; Z: pulmonary artery