Research work has given physiologists the possibility to find out that the heart muscle works or contracts about one third of the time of the person’s life. The period of rest is shorter during greater physical exertion and longer when the body is at rest. Each cardiac cycle consists of three phases: physiologists have called the first phase of short contraction of both atria—the atrial systole.
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- Research work has given physiologists the possibility to find out that the heart muscle works or contracts about one third of the time of the person’s life.
- Physiologists have established that in the adult the heart makes from 60 to 7,' beats per minute.4n children the rate of heartbeat is much higher.
- The human heart contracts from the first moment of life until the last one.
- The contraction of the human heart is off-set between the atria and the ventricles. First the atria contract and then the ventricles contract shortly after.Bulunamadı: moment
- Physiologists have established that in the adult the heart makes from 60 to 7,' beats per minute.4n children the rate of heartbeat is much higher.
- The Work of the Human Heart The human heart contracts from the first moment of life to the last one.
- Physiologists have established that in the adult the heart makes from 60 to 7,' beats per minute.4n children the rate of heartbeat is much higher.
- Physiologists have established that in the adult the heart makes from 60 to 7,' beats per minute.4n children the rate of heartbeat is much higher.
- The period of rest is called the diastole. Research work of many physiologists has estimated the role of the ventricles as the main pump of the human heart.
- Physiologists have established that in the adult the heart makes from 60 to 7,' beats per minute.4n children the rate of heartbeat is much higher.