19 Amazing Facts of Heart and Blood


  1. Weight of heart in an average human being is about 300 gr. (less than a pound). However, on average a man’s heart is 2 ounces heavier than a woman’s heart.
  2. Heart pumps about 2000 gallons (7570 liters) of blood each day. Each minute about 1.5 gallons of blood.
  3. The beating sound of heart is caused by the opening and closing of valves.
  4. One cardiac cycle – the contracting and relaxing of heart muscle, what we call as a beat takes 0.8 seconds.
  5. Human heart beats over 110,000 times a day and 35 million (3.5 crores) times a year.
  6. The first heart cell starts to beat at 4 weeks in mother’s womb.
  7. The human heart can create enough pressure that it could squirt blood at 30 feet distance.
  8. The function of hemoglobin in blood is – transport oxygen to all the organs, tissues and cells in the body except cornea the outer layer of an eye.
  9. The adult human body requires about 88 pounds of oxygen every day.
  10. On any given day our blood ‘travels’ a distance of 19,312 km.
  11. There are about 60,000 miles of blood vessels in human body.If they are laid end to end they would stretch around the world more than twice.
  12. Woman’s heart beats faster than man’s almost 8 beats a minute.
  13. Heart cancer is extremely rare because heart cells stop dividing early in life.
  14. Heart is a coordinated machine like thing. The right side of heart pumps blood into lungs, while the left side pumps back into the body.
  15. The weight of blood in human body is about 7 per cent.
  16. The human body contains approximately 37,000 miles of capillaries.
  17. When we sneeze, all the body functions momentarily stop including heart. That’s why “God bless”.
  18. Blue whales have the largest heart of all mammals weighing over 1500 pounds. (680kgs).
  19. The first open heart surgery occurred in 1893.


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