|
During each cardiac cycle, prominant sounds are produced which can be easily heard through stethoscope. They are |
|||||||
|
a) |
Lub |
b) |
Dub |
c) |
Tick |
d) |
Both (a) and (b) |
|
During each cardiac cycle, prominant sounds are produced which can be easily heard through stethoscope. They are |
|||||||
|
a) |
Lub |
b) |
Dub |
c) |
Tick |
d) |
Both (a) and (b) |
(d)
The closing of atrioventricular valves during ventricular systole produces the first heart sound, lub.
During ventricular diastole, the semilunar valves are closed and blood is forced back into the ventricles. Due to the high pressure developed in the vessels, this causes the second heart sound, dub