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Heart Facts

Myogenic muscular organ found found in animals with circulation system

  • 'Cardiac' is a Greek word to mean 'related to the heart'.
  • Heart is composed of cardiac muscle and connective tissue.
  • Average human heart beats at 72 beats per minute.
  • A heart beats approximately 2.5 billion times during an average 66 year lifespan.
  • A human heart weighs approximately 250 to 300 grams in females and 300 to 350 grams in males.
  • Valves of the heart were discovered by a physician of the Hippocratean school around the 4th century BC.
  • Plato theorized that reasoning originated in the brain, but passion originated in the heart.
  • The human heart has four chambers, two superior atria and two inferior ventricles.
  • Women hearts beat faster than men.
  • The first open heart surgery was performed by Dr. Daniel Hall Williams in 1893.
  • The first successful heart transplant was performed in Cape Town, South Africa in 1967.
  • Most heart attacks occur between the hours of 8 and 9 AM.
  • Blood takes about 20 seconds to circulate through the entire human body.
  • The heart pumps blood to almost all of the body’s 75 trillion cells. Only the corneas receive no blood supply.
  • Electrical impulses in the heart muscle (the myocardium) are what cause the heart to beat.
  • The risk of heart disease for inactive people is double that of people who get regular exercise.
  • A newborn baby has about one cup of blood in circulation.
  • Prolonged lack of sleep can cause irregular jumping heartbeats called premature ventricular contractions (PVCs).
  • Heartbeats with enough strength to shoot blood a distance of 30 feet.
  • The Electrocardiogram (ECG) is used to test heart rate was developed in 1902.
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