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Monday, 22 June 2015

Heart

HEART ANATOMY

Aristotle believed that the heart was the source of intelligence and the body's source of heat. He thought that the  main function of the brain was to cool our blood. This belief continued into the Middle Ages.

If you want to imagine how big your heart is, make a fist with your hand. Your heart is about the same size as the fist of your hand.

The heart of an astronaut actually gets smaller when in outer space.

An average man's heart weighs 10-12oz; an average woman's heart weighs 8-10oz.

The right-hand side of your heart pumps blood into the lungs to pick up oxygen, the left side pumps oxygenated blood round the body.

Over a lifetime, the human heart pumps enough blood to fill a football stadium.

The human heart creates enough pressure while pumping to squirt blood 30 feet.

The corneas of your eyes are the only cells in your body that do not receive a blood supply from the heart.

The heart of an unborn baby begins to beat about four weeks after conception.

In an average lifetime, a human heart will beat almost three billion times.

Heart normal anterior exterior anatomy. By Patrick J. Lynch, medical illustrator - Wikipedia Commons

Women's hearts beat faster than men's: an average of 78 beats a minute compared with 72.

The energy of a day's heart-beating would be enough to drive an average truck 20 miles.

The sound of a heartbeat is the noise made by the four valves of the heart closing.

In Indonesian, the onomatopoeia for a heartbeat is "Dig dag dug."

The human heart is not heart-shaped. A cow's heart is more heart-shaped than a human one.

THE HEART IN CULTURE

The heart symbol was created because the Catholic church prohibited autopsies until the 16th century—no one knew what a heart looked like.

The earliest known visual depiction of a heart symbol, as a lover hands his heart to the beloved lady, in a manuscript of the Roman de la poire, which dates to around 1250 (see below).


The use of a heart shape in a logo to signify love was popularized by graphic designer Milton Glaser in his 1977 I [heart] New York poster and T-shirt campaign.


According to the two billion-word Oxford English Corpus, the adjective most often used to qualify the noun 'heart' is 'broken'.

NON-HUMAN HEARTS

Most mammals' hearts beat around one billion times in their lives. Species with shorter lifespans have faster pulse rates.

A blue whale's heart is the size of a Volkswagen Beetle and you could swim through some of its arteries.

The heart of a blue whale weighs about 1,500 lb

An octopus has three hearts, two to pump blood through the gills, one to pump it around the body..

Source Daily Express

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