Interesting fact on our Heart!

How it developed...
Our human heart is fully developed about eight weeks after conception, when the embryo is only about one inch long. The heart actually begins to beat even earlier,about four weeks after conception.

How much work is done...

Our heart pumps about 5 quarts of blood each minute which is approximately 7570 litres of blood each day throughout the body.

Do you know that your heart beats about 100,000 times each day. And doing a simple calculation, in a 70-year lifetime, the average human heart beats more than 2.5 billion times.

An adult woman's heart weighs about 8 ounces which is about 227 grams, and a man's about 10 ounces which is about 283 grams. And a child's heart is about the size of a clenched fist; an adult's heart is about the size of two fists.

It consists chiefly of muscle and can perform enough work in one hour to lift 3,000 pounds, roughly the weight of a small car, about one foot off the ground . In addition, the human heart can create enough pressure that it could squirt blood at a distance of thirty feet, amazing right?

Where is our heart...

There is common misconception that the location of our heart is at the left side of our chest.
In fact, our heart is located in the middle of your chest between your lungs. You feel more of your heart on your left side of your chest because the bottom of the heart is tipped to the left. The right lung of a human is larger than the left one. This is because of the space and placement of the heart too.

More interesting facts on blood vessels and blood....
Your system of blood vessels - arteries, veins and capillaries - is over 60,000 miles long. That's long enough to go around the world more than twice!

Do you know how often does blood go around our body?
Actually blood goes around the body about once a minute, 1500 times a day.

And an average man, has between 5 to 6 litres of blood, while an average women has between 4 to 5 litres of blood.

Do you know?

A breakup with a loved one or news of a family death literally can lead to broken hearts in the form of heightened risk for heart attack, studies have shown. Such trauma can also trigger the release of stress hormones into the bloodstream that temporarily "stun" the heart.

People say "Bless you" when you sneeze because when you sneeze, your heart stops for a millisecond.

Women hearts beat faster than men. The main reason for this is simply that on average women tend to be smaller than men and have less mass to pump blood to.


Resources and credits:
http://my.clevelandclinic.org/heart/heartworks/heartfacts.aspx
http://www.stunning-stuff.com/list-funny-facts/5.html?pg=5
http://www.funshun.com/amazing-facts/heart-human-body-facts.html
http://www.muskurahat.com/amazing-facts/Heart-facts-2.asp
http://wiki.answers.com/Q/What_are_interesting_facts_about_the_heart

Book : Human body, written by Angela Royston
Illustrated by Mike Suanders



Lastly, this is a video to help us understand heart diseases better.

Done By:
XingJie
LooPin
JingWen
Qinghua