News tagged with heart

Related topics: heart attack , heart failure , heart disease , heart muscle , patients

A shot against heart attacks?

Harvard Stem Cell Institute (HSCI) scientists collaborating with researchers at the University of Pennsylvania have developed a "genome-editing" approach for permanently reducing cholesterol levels in mice ...

Jun 10, 2014
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Scientists explain stress-heart attack link

Scientists said Sunday they may have unravelled how chronic stress leads to heart attack and stroke: triggering overproduction of disease-fighting white blood cells which can be harmful in excess.

Jun 22, 2014
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Can narcissists be moved to show empathy?

Researchers at the University of Surrey and the University of Southampton have investigated whether narcissists can elicit empathy for another person's suffering. It has been well documented that narcissists lack empathy, ...

May 30, 2014
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Keeping active pays off even in your 70s and 80s

Older people who undertake at least 25 minutes of moderate or vigorous exercise everyday need fewer prescriptions and are less likely to be admitted to hospital in an emergency, new research has revealed.

May 27, 2014
popularity 5 / 5 (5) | comments 0

Heart

The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."

The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

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