Monday, February 9, 2015

Have a Heart

Happy Valentine's Day on February 14!! What do you know about the heart?

  • The 'heart' shape we use now was probably an effort to draw the heart before people knew what it looked like inside the body. 

                Cross-section, human heart. All mammal hearts look very similar.... such as:

                                        This is a pig's heart

                                         This is the heart of a dog

  • A human heart beats about 70 times a minute in men, 78 times a minute in women
  • A transplanted heart beats about 100-110 times per minute
  • The left lung is a little smaller than the right so there is enough room for the heart
  • The heart weighs about 11 ounces and is about the size of your fist
  • Your heart beats 100,000 times a day and 2.5 billion times in a lifetime
  • It pumps 2000 gallons of blood every day
  • All mammal hearts have four chambers
  • That  'thump-thump' sound the heart makes is due to the four heart valves opening and closing
  • The only organs in your body that do not receive blood are the corneas in your eyes
  • Cocaine interferes with the heart's electrical activity and can stop the heart
  • 30% of people who die of heart disease are smokers; at least 20% of people die from smoking-related disease that may not be of the heart: Emphysema, for example.

  • In 2006, death rates due to heart disease were the worst in Mississippi and the fewest in Minnesota
  • Heart disease kills 500,000 women a year and 450,000 men a year
  • CT scans of ancient Egyptian mummies show that they had heart disease....and this was long before fast food diets and not enough activity, which is known to cause heart disease now
  • Women's heart attack symptoms are more likely to include a feeling of nausea, indigestion, and pain in the jaw or the shoulder
  • Men's heart attack symptoms are typically sweating, pain down the left arm, shortness of breath, and chest pain
Someone with an irregular heartbeat may be fitted with a pacemaker that will regulate his or her heart. Learn about pacemakers here:
If you are not too squeamish, here is a video of a heart beating and surgeons at work:
A good graphic of the heart as it beats, you can see the different chambers closing and opening:


Take Care Of Your Heart!! 

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