Science – The Heart

By David, Seán, Emily, Killian, Rebecca and Lizzie.

This year in sixth class our first science topic was on the heart. ❤️

Here are the blood groups:

A: 40% of people have this.
B:11% of people have this.
AB: 4% of people have this
O: 45% of people have this.
Bombay and Helsinki are the rarest blood groups.

An adult’s heart pumps around 15,000 litres of blood around their body per day! An average heart beats around 70 times per minute. A sparrow’s heart beats around 500 times per minute! That is because the smaller, the animal the faster it’s heart beats, so the bigger the animal, the slower the heart beats. An elephant’s heart beats around 25 – 30 times per minute.
Veins bring unoxygenated blood to the heart to be oxygenated. Arteries bring oxygenated blood around the body. An easy way to remember this is: veins visit and arteries away.

Here are some interesting facts on the heart:

  • Owning a cat can decrease the chance of having heart disease or a stroke by over 30%.
  • Your heart beats over 100,000 times a day.
  • Everyday, your heart creates enough energy to drive a truck 32 kilometres.
  • Your heart can keep beating even if it is separated from the body because it has it’s own electrical impulse.
  • Your heart will pump nearly 1.5 million barrels of blood during your lifetime, enough to fill 200 train tank cars.
  • Your heart beats over 100,000 times per day.
  • Your heartbeat changes and mimics the music you listen to.
  • Your left lung is smaller than your right lung to make room for your heart.
  • Vegetarians are 19% less likely to die from heart disease, a study found.
  • Eating dark chocolate every day reduces the risk of heart disease by one third.
  • Couples who are in love synchronize their heart rates after gazing into each others’ eyes for three minutes.


  1. Lorna Doran
    Fascinating facts guys. Great work!
    September 22, 2014 at 11:25 am
  2. Maria
    Amazing, great work!
    September 24, 2014 at 1:19 pm

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