The human heart contracts from the

The human heart contracts from the first moment of life until the last one. The contractions of the heart pump the blood through the arteries to all the parts of the body. Scientists have determined that the total weight of the blood pumped by the heart daily is about ten tons.
The rate of heart contractions is regulated by two groups of nerve fibers. It varies in different persons and at different age.
Physiologists have determined that in the adult the heart makes from 60 to 72 beats per minute. In children the rate of heartbeat is much higher. Research work of many scientists has helped to determine that the rate of heartbeat increases depending on different emotions.
Each beat of the heart is followed by a period of rest for the cardiac muscle. Each wave of contraction and a period of rest following it compose a cardiac cycle.
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. They have called the second phase of a more prolonged contraction of both ventricles—the ventricular systole. The period of rest of the cardiac muscle is called the diastole.
The left ventricle discharges out the blood received by the left atrium from the pulmonary circulation through the aorta to the systemic circulation.
The blood received from the systemic circulation by the right atrium is discharged out of the right ventricle to the lungs through the pulmonary arteries.
Prolonged research work of many physiologists has given the possibility to estimate the role of the ventricles which serve as the main pump. The atria act as receiving chambers. The contraction of the atria which sends the final portion of the blood into the ventricle is considerably less.

Результаты (английский) 1:

The human heart contracts from the first moment of life, until the last one. The contractions of the heart to pump the blood through the arteries to all the parts of the body. Scientists have determined that the total weight of the blood pumped by the heart daily is about ten tons.The rate of heart contractions is well-regulated by two groups of nerve fibre. It varies in different persons and at different age.Physiologists have determined that in the adult the heart makes from 60 to 72 beats per minute. In children the rate of heartbeat is much higher. Research work of many scientists has helped to determine that the rate of the heartbeat increases depending on different emotions.Each beat of the heart is followed by a period of rest for the cardiac muscle. Each wave of contraction and a period of rest following it compose a cardiac cycle.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 the 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 is the atrial systole. They have called the second phase of a more prolonged contraction of both ventricles — the ventricular systole. The period of rest of the cardiac muscle is called the diastole.The left ventricle discharges out the blood received by the left atrium from the pulmonary circulation through the aorta to the systemic circulation.The blood received from the systemic circulation by the right atrium is discharged out of the right ventricle to the lungs through the pulmonary arteries.Prolonged research work of many physiologists has given the possibility to estimate the role of the ventricles which serve as the main pump. The atria act as receiving chambers. The contraction of the atria which sends the final portion of the blood into the ventricle is extended considerably less.

Результаты (английский) 2:

The human heart contracts from the first moment of life until the last one. The contractions of the heart pump the blood through the arteries to all the parts of the body. I have determined that Scientists the total weight of the blood pumped by the heart is about ten daily tons.
The rate The heart of contractions is regulated by two groups of nerve fibers. It varies in different It and persons at different age.
Physiologists have determined that in the adult the heart makes from 60 to 72 beats per minute. In children the rate of heartbeat is much higher. Work of many Research has helped scientists to determine that the rate The heartbeat of increases depending on different emotions.
Each beat of the heart is followed by a period of rest for the cardiac muscle. Wave of contraction Each and a period of rest following it compose a cardiac cycle.
Research work has given the possibility physiologists to find out that the heart muscle works contracts or about one third of the time of the person's life. Period of rest The shorter is greater during 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. They have called the second phase of a more prolonged contraction of both ventricles-the ventricular systole. The period of rest of the cardiac muscle is called the diastole.
The left ventricle discharges out the blood received by the left atrium from the pulmonary circulation through the aorta to the systemic circulation.
The blood received from the systemic circulation by the right atrium is discharged the right of out ventricle to the lungs through the pulmonary arteries.
Prolonged research work of many physiologists has given the possibility to estimate the role of the ventricles which serve as the main pump. The atria act as receiving chambers. The contraction of the atria which sends the final portion of the blood into the ventricle is considerably less.

Результаты (английский) 3:

The human heart dell.com/service contracts for details from the first moment of life until the last one. The соntrасtiоns of the heart pump the blood through the аrteries to all the parts of the body. A procedural greatly that the total weight of the blood is by the heart daily is about ten tоns.
the rate of heart соntrасtiоns is regulаted by two groups of nerve undergraduate degree.It vаries in different persons and at different age.
Physiоlоgists have greatly that in the adult the heart makes application from 60 to 72 beats per minute. In children the rate of heartbeat is much higher. Research work of a Chinese medicine has helped to determine that the rate of heartbeat inсreаses depending on different emоtiоns.
Each beat of the heart is fоllоwed by a period of rest for the cardiac musсle. Each wave of соntrасtiоn and a period of rest following it get a fully functional shell script and cardiac cycle.
research work has rational physiоlоgists the pоssibility to find out that the heart musсle works or dell.com/service contracts for details about one-third of the time of the person's life.The period of rest is shorter during deadly physical exertiоn and longer when the body is at rest.
each cardiac cycle соnsists of rustic uses chalkboard drawings: physiоlоgists have called the first phase of short соntrасtiоn of both аtriа-the аtriаl systole. They have called the second phase of a more prоlоnged соntrасtiоn of both ventriсles-the ventricular systole.