News tagged with heart

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

Sounding the alarm about caffeine powder

In a world craving stimulation to stay awake, function at peak levels or just feel a bit brighter, caffeine is the ready ingredient in an expanding array of foods, beverages and medications.

Jan 20, 2015
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Poor social integration = poor health

There are many benefits to being supported by a strong social network. But can having more friends actually make you healthier? New research from Concordia shows that social relationships affect not only ...

Jan 20, 2015
popularity 3.8 / 5 (4) | 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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