The first heart sound ‘Lubb’ occurs in which phase of the cardiac cycle? |
|||||||
a) |
Isometric relaxation |
b) |
Atrial diastole |
c) |
Ventricular systole |
d) |
Ventricular diastole |
The first heart sound ‘Lubb’ occurs in which phase of the cardiac cycle? |
|||||||
a) |
Isometric relaxation |
b) |
Atrial diastole |
c) |
Ventricular systole |
d) |
Ventricular diastole |
(a)
In human heart, right auricle opens into right ventricle and the auriculo-ventricular aperture is guarded by a tricuspid valve. The opening of left auricle into left ventricle is guarded by bicuspid or mitral valve.