News tagged with heart

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

Before you go... are you in denial about death?

For most of us, death conjures up strong feelings. We project all kinds of fears onto it. We worry about it, dismiss it, laugh it off, push it aside or don't think about it at all. Until we have to. Of course, ...

3 hours ago
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New drugs from fish oil could aid artery repair

Every year, more than a half-million Americans undergo procedures to have a narrowed coronary artery propped open with a small metal mesh tube, or stent. The procedure is common for certain patients who've ...

Nov 24, 2014
popularity 4.5 / 5 (2) | 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.

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