It’s impossible to sneeze with your eyes open. The average human blinks their eyes 6,205,000 times each year. Women blink nearly twice as much as men. When you sneeze, all your bodily functions stop even your heart.
Our eyes are always the same size from birth, but our nose and ears never stop growing.
If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth.
It takes the interaction of 72 different muscles to produce human speech.
The average cough comes out of your mouth at 60 miles (96.5 km) per hour.
Relative to size, the strongest muscle in the body is the tongue.
Human thigh bones are stronger than concrete.
It takes the stomach an hour to break down cow milk.
The average human head weighs about 8 pounds.
An average human scalp has 100,000 hairs. Hair is made from the same substance as fingernails. Skull is made up of 29 different bones.
In the average lifetime, a person will walk the equivalent of 5 times around the equator.
Therefore, the nail on your middle finger grows the fastest, and on average, your toenails grow twice as slow as your fingernails. After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death. Ears and nose continue to grow throughout entire life.
The surface of the human skin is 6.5 square feet (2m).
15 million blood cells are destroyed in the human body every second.
The most sensitive cluster of nerves is at the base of the spine.
The human body is comprised of 80% water.
Every year about 98% of the atoms in your body are replaced.
Human born with 300 bones. When you get to be an adult, you have 206. Human thighbones are stronger than concrete.
There are 45 miles (72 km) of nerves in the skin of a human being.
The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood.
During a 24-hour period, the average human will breathe 23,040 times.
Human blood travels 60,000 miles (96,540 km) per day on its journey through the body
The average human brain has about 100 billion nerve cells.
Nerve impulses to and from the brain travel as fast as 170 miles (274 km) per hour.