100 Amazing Things Happening Inside Your Body

• 1. Your heart beats around 100,000 times a day.
• 2. The human nose can detect over 1 trillion scents.
• 3. Your skin renews itself every 28 days.
• 4. Your brain uses about 20% of your body’s oxygen and calorie intake.
• 5. You shed about 600,000 skin cells every hour.
• 6. There are more bacteria in your mouth than there are people on Earth.
• 7. Your stomach gets a new lining every 3 to 4 days.
• 8. Your bones are about five times stronger than steel of the same density.
• 9. You produce about 1 to 1.5 quarts of saliva each day.
• 10. Your body has enough iron to make a 3-inch nail.
• 11. Your intestines are about 25 feet long.
• 12. Humans glow in the dark, but the light is 1,000 times weaker than the human eye can perceive.
• 13. Your left lung is smaller than your right to make room for your heart.
• 14. Your brain generates enough electricity to power a small light bulb.
• 15. Every second, your body produces 25 million new cells.
• 16. Blood makes up about 8% of your body weight.
• 17. Your teeth are as unique as your fingerprints.
• 18. Your ears continue to grow throughout your lifetime.
• 19. Your body contains about 37.2 trillion cells.
• 20. You blink around 15–20 times per minute.
• 21. You can’t tickle yourself because your brain predicts the sensation.
• 22. You lose about 50 to 100 hairs per day.
• 23. You can survive without a spleen.
• 24. Your fingernails grow faster on your dominant hand.
• 25. The average human body contains enough fat to make 7 bars of soap.
• 26. The acid in your stomach is strong enough to dissolve razor blades.
• 27. Your taste buds are replaced every 10 to 14 days.
• 28. Babies have around 270 bones at birth, but adults have only 206.
• 29. You have tiny mites living on your eyelashes.
• 30. Goosebumps are a reflex from our evolutionary ancestors.
• 31. Humans are the only animals that blush.
• 32. Your eyes can distinguish about 10 million different colors.
• 33. The liver can regenerate itself.
• 34. Your pinky finger contributes about 50% of your hand strength.
• 35. You have more than 600 muscles in your body.
• 36. Your bones are constantly being broken down and rebuilt.
• 37. Your body has enough carbon to fill 9,000 pencils.
• 38. Your sweat is odorless; body odor comes from bacteria on the skin.
• 39. Humans have a ‘second brain’ in their gut, the enteric nervous system.
• 40. Each kidney contains about a million filtering units called nephrons.
• 41. You are taller in the morning than at night.
• 42. Your bones stop growing after puberty but your ears and nose never stop.
• 43. A single strand of hair can support about 100 grams of weight.
• 44. Your liver performs over 500 vital functions.
• 45. You have a unique tongue print.
• 46. The surface area of a human lung is roughly the same size as a tennis court.
• 47. The human body gives off a small amount of light.
• 48. The average person walks the equivalent of five times around the world in a lifetime.
• 49. The brain has no pain receptors.
• 50. You can hear your own heartbeat in a quiet room.
• 51. Your small intestine is longer than a car.
• 52. Your blood travels about 12,000 miles each day.
• 53. The strongest muscle in your body is the masseter (jaw muscle).
• 54. Your eyes focus on about 50 different objects every second.
• 55. You have enough blood vessels to circle the globe 2.5 times.
• 56. Each fingerprint has about 40 unique characteristics.
• 57. Your eyelashes have a lifespan of about 150 days.
• 58. The average sneeze travels at 100 miles per hour.
• 59. Your feet have about 250,000 sweat glands.
• 60. The average person has about 5 million hair follicles.
• 61. You have more nerve cells in your gut than in your spinal cord.
• 62. Blood is 4–5 times thicker than water.
• 63. You breathe about 20,000 times a day.
• 64. Humans share about 60% of their DNA with bananas.
• 65. You can’t breathe and swallow at the same time.
• 66. A newborn baby has about one cup of blood in its body.
• 67. Shivering generates heat by rapidly contracting muscles.
• 68. Your body contains about 0.2 milligrams of gold.
• 69. Your brain is sometimes more active when you’re asleep.
• 70. The average lifespan of a human hair is 2–7 years.
• 71. The human thigh bone is stronger than concrete.
• 72. There are over 100,000 miles of blood vessels in the human body.
• 73. Your fingernails grow about 3.5 millimeters per month.
• 74. You can lose up to 30% of your bone mass before it’s detectable on X-ray.
• 75. Your nose can remember 50,000 different scents.
• 76. The cornea is the only part of the body with no blood supply.
• 77. You use 200 muscles to take one step.
• 78. The brain processes pain signals but does not feel pain itself.
• 79. Sweat glands are most concentrated on the palms and soles.
• 80. You grow about 8 meters of hair in total every year.
• 81. The placenta is the only organ that grows in another human.
• 82. Your pupils dilate when you look at someone you love.
• 83. Your brain has about 86 billion neurons.
• 84. Your fingers don’t have muscles – they move via tendons from the forearm.
• 85. The human body can survive weeks without food but only days without water.
• 86. Coughs can force air out of the body at nearly 50 mph.
• 87. The appendix has immune functions.
• 88. Your body uses 300 calories to digest a large meal.
• 89. Red blood cells take about 60 seconds to complete one cycle around the body.
• 90. There are 45 miles of nerves in the skin of a human being.
• 91. Human bones are composed of 31% water.
• 92. Your ears help you balance.
• 93. The body can make about 11 liters of sweat in a hot day.
• 94. Your eyes blink about 4.2 million times a year.
• 95. The skin is your largest organ.
• 96. Nerve impulses travel at over 250 mph.
• 97. The adult human body is made up of about 60% water.
• 98. You burn more calories sleeping than watching TV.
• 99. The average human body contains about 0.2 mg of uranium.
• 100. Humans are the only animals with chins.