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Human Body

  • A single hair can hold the weight of a hanging apple. However, scientists don’t specify the dimensions of the apple.
  • The number of bacteria in a person’s mouth is equal to the number of people living on Earth, or even more
  • The speed of an incoming brain impulse is about 400 km/h.
  • Over the course of just one day, our blood ’runs’ the distance of 19,312 kilometers.
  • The total length of all the nerves in the human body is 75 kilometers.
  • A human eye can distinguish up to 10 million different colors. But our brain can’t remember all of them.
  • The largest bone in the human body is the femur. It can support 30 times the weight of a person's body. Ounce for ounce, that's stronger than steel.
  • Messages from the human brain travel along nerves at up to 200 miles an hour (322 km/h).
  • A human’s little finger contributes over 50% of the hand’s strength.
  • If a human being’s DNA were uncoiled, it would stretch 10 billion miles, from Earth to Pluto and back.
  • For an adult human, taking just one step uses up to 200 muscles
  • The body can detect taste in .0015 seconds, which is faster than the blink of an eye.
  • There are ten times more bacteria cells in your body than human cells.
  • The brain contains 86 billion nerve cells joined by 100 trillion connections. This is more than the number of stars in the Milky Way (our galaxy).
  • The average human produces 25,000 quarts of saliva in a lifetime, enough to fill two swimming pools.
  • The lining in a person's stomach is replaced every 4 to 5 days to prevent it from digesting itself.
  • An adult human’s small intestine is about 18 to 23 feet long, which is about four times as long as an adult is tall.
  • A human sneeze can travel about 100 mph or more.
  • An adult human body is made up of about 7 octillion atoms.
  • The liver the largest internal organ and is the only organ that can regenerate itself. However, repeated damage to the liver can eventually injure and scar this amazing organ.
  • The human brain uses just as much power as a 10-watt light bulb.
  • There are so many nerve cells in a human brain that it would take almost 3,000 years to count them.
  • The longest bone in an adult human is the thighbone, measuring about 18 inches (46 cm). The shortest bone is in the ear and is just 0.1 inches (.25 cm) long, which is shorter than a grain of rice.
  • An adult’s stomach can hold over two quarts (1.9 l) of food. That’s enough to fill four large or eight small drinking glasses.
  • In an adult human, blood circulates about 12,000 miles (19,000 km) a day. This is like traveling from east to west across the widest part of the Pacific Ocean.
  • A human heart beats over 3 billion times during an average human lifespan.
  • "Rubatosis" is the unsettling awareness of your own heartbeat.
  • A person takes about 23,040 breaths a day, or about 672,768,000 breaths in a lifetime
  • Fingers don’t have muscles that facilitate movement. The tendons in our fingers are moved by the muscles of the forearm.
  • Like Wolverine, the liver is the only organ that can completely regenerate. As little as 25% of the original liver mass can regenerate back to its full size.

There are still more facts about the human body which I didn’t mention yet. For more wait till my next blog is posted…


  • Writer


    Class V
    Lakehead Grammer School



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