Genetics

Gene networks reveal transition from healthy to failing heart

Scientists investigating heart failure have been limited to studying diseased heart tissue in the lab—understandably, as people don't tend to pluck out a healthy heart for the sake of research. But now, scientists with ...

Cardiology

Non-invasive view into the heart

The non-invasive measurement of blood flow to the heart using magnetic resonance imaging (MRI) is on par with cardiac catheterization. This was the result of an international study published in the current issue of the New ...

Psychology & Psychiatry

How working out in anger can put you at risk

(HealthDay)—Research points to a very long list of benefits from exercise, from improving your overall health to easing stress and enhancing mental well-being. But a landmark study in the journal Circulation highlights ...

Health

How to pack more plant protein into your everyday diet

(HealthDay)—You don't have to adopt a total vegetarian lifestyle to improve your health. You can get some of its advantages simply by replacing some of the animal proteins in your diet with plant-based ones.

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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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