News tagged with human heart

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A single workout could save your life

There is plenty of evidence that being physically active can reduce your risk of heart disease and stroke, but when do the benefits of exercise start to pay off? You might think that it's after a few weeks – or even months ...

Dec 13, 2017
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Spinal cord injury affects the heart

Spinal cord injury affects the heart, that's what research published in Experimental Physiology and carried out by researchers from University of British Columbia, Canada has found.

Dec 12, 2017
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Muscles out of the spray can

An artificial heart would be an absolute lifesaver for people with cardiac failure. However, to recreate the complex organ in the laboratory, one would first need to work out how to grow multi-layered, living tissues. Researchers ...

Nov 07, 2017
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Human heart

The human heart provides a continuous blood circulation through the cardiac cycle and is one of the most vital organs in the human body. It is divided into four chambers: the two upper chambers are called the left and right atria and two lower chambers are called the right and left ventricles. Normally the right ventricle pumps the same blood amount into the lungs with each bit that the left ventricle pumps out. Physicians commonly refer to the right atrium and right ventricle together as the right heart and to the left atrium and ventricle as the left heart.

The electric energy that stimulates the heart occurs in the sinoatrial node, which produces a definite potential and then discharges, sending an impulse across the atria. The Purkinje fibers transmit the electric charge to the myocardium while the cells of the atrial walls transmit it from cell to cell, making the atrial syncytium.

The human heart and its disorders (cardiopathies) are studied primarily by cardiology.

This text uses material from Wikipedia, licensed under CC BY-SA

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