![Heart sound. What we hear ? We have all heard the heart make the usual sounds. LUB DUB Lub is the first sound or S1 Dub is the second heart sound. - Heart sound. What we hear ? We have all heard the heart make the usual sounds. LUB DUB Lub is the first sound or S1 Dub is the second heart sound. -](https://slideplayer.com/5674772/18/images/slide_1.jpg)
Heart sound. What we hear ? We have all heard the heart make the usual sounds. LUB DUB Lub is the first sound or S1 Dub is the second heart sound. -
![Heart Actions Cardiac Cycle: One complete heartbeat. The contraction of a heart chamber is called systole and the relaxation of a chamber is called diastole. - ppt download Heart Actions Cardiac Cycle: One complete heartbeat. The contraction of a heart chamber is called systole and the relaxation of a chamber is called diastole. - ppt download](https://images.slideplayer.com/18/5674782/slides/slide_4.jpg)
Heart Actions Cardiac Cycle: One complete heartbeat. The contraction of a heart chamber is called systole and the relaxation of a chamber is called diastole. - ppt download
![The Heartbeat Cardiac cycle = contractions and relaxations of heart muscles in a complete heartbeat Takes ~0.8 s. - ppt download The Heartbeat Cardiac cycle = contractions and relaxations of heart muscles in a complete heartbeat Takes ~0.8 s. - ppt download](https://images.slideplayer.com/23/6852199/slides/slide_3.jpg)