Amazing Facts about the Human Body


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). In an adult human, 25% of their bones are
on the feet. The gluteus maximus is the body’s largest
muscle. A human’s ears and nose never stop growing. 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. There are more bacteria in a human mouth than
there are people in the world. Within three days of dying, the enzymes that
digested a person’s food will begin to diegest that person’s body. For an adult human, taking just one step uses
up to 200 muscles. A human skeleton renews itself completely
every 10 years. The same skin cells that make up a human vagina
are the same type of cells that are in a human mouth. By the time a person reaches 70 years old,
he or she will have consumed over 12,000 gallons of water. The body can detect taste in .0015 seconds,
which is faster than the blink of an eye. The brain contains 86 billion nerve cells
joined by 100 trillion connections. This is more than the number of stars in the
Milky Way. Every hour, humans shed about 600,000 particles
of skin, or about 1.5 pounds every year. By the time a person is 70 years old, they
will have lost about 105 pounds of skin. The average human produces 25,000 quarts of
saliva in a lifetime, enough to fill two swimming pools. The lining of a person’s stomach is replaced
every 4 to 5 days to prevent it from digesting itself. An adult humans small intestine is about 18
to 23 feet long, which is about four times as long as an adult is tall. Semen normally contains 1-8 billion sperm
per fluid ounces. 140, 300 million sperm per millimeter. A human sneeze can travel about 100 mph or
more. Fingernails grow faster on the hand a person
writes with. An adult human body is made up of about 7
octillion atoms. The human brain uses just as much power as
a 10-watt light bulb. An adult who weighs 150 pounds has a skeleton
that weighs about 21 pounds. 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. In a lifetime, a human body will process about
100,000 pounds of food. The fastest muscles in a human body are the
ones that make the eyes blink. They can contract in less than one-hundredth
of a second. In just one day, a person may blink their
eyes over 11,500 times. Humans spend about five years of their lives
eating. 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.

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