Contraction of the ventricles and atria is called systole. Relaxation is called diastole.
What you feel in your wrist is a pulse. The pulse is caused by the heart pumping blood round your body.
relaxation and contraction of the heart
Contraction and relaxation are two opposites. They work together when the muscles of the body work. A good example is the contraction and relaxation of the heart. The contraction allows blood to be distributed to the parts of the body while the relaxation allows the heart to be oxygenized and therefore fill up blood to be distributed to the whole body.
contraction and relaxation of the heart muscles
contraction and relaxation of the heart muscles
The relaxation phase of the heartbeat is called diastole. During diastole, the heart ventricles relax and fill with blood in preparation for the next contraction.
I believe that is called diastole, in contrast to systole, the contraction of the heart muscles.
Those which occur during relaxation of the heart between beats are called diastolic murmurs. Those which occur during contraction of the heart muscle are called systolic murmurs
Myocardial layer
Cardiac cycle, which is made up of atrial and ventricular systole and diastole.
This process is known as the pulse and is the result of the heart pumping blood into the arteries. As the heart contracts (systole), blood is pushed into the arteries causing them to expand. When the heart relaxes (diastole), the arteries recoil back to their original shape, creating a pulse that can be felt in different parts of the body.