Interesting facts about human body

Hey since I am a doctor by profession,one post on human body is must right??

Here are some interesting facts about human body -

The human heart pumps 182 million litres of blood during the average lifetime.

The only part of the body that has no blood supply is the cornea of the eye. It receives oxygen directly from the air.

Women’s hearts beat faster than men’s.

Only 1% of the bacteria can result in the human body becoming ill.

Only 7% of people are left-handed.

On average, a person needs seven minutes to fall asleep.

Tooth enamel is the hardest substance in the human body.However, we do not recommend that you use your pearly whites to open bottle caps!

Right-handed people chew most of their food on the right side of their mouth, whereas left-handed people do so on the left.

99% of the calcium contained in the human body is in one’s teeth.

Human lips are hundreds of times more sensitive than the tips of a person’s fingers.

There are more than 100 different viruses which cause a cold.

Human skin is completely replaced about 1,000 times during a person’s lifetime.

Fingernails grow about four times faster than your toenails.

100,000 chemical reactions occur in the human brain every second.

The surface area of the human lungs is approximately equal to the area of a tennis court.

The strongest muscle in the human body is the tongue.

The human heart is approximately equal in size to that of a person’s fist. An adult’s heart weights 220-260 grams.

At birth, a child’s body is made up of around 300 bones. But an adult has just 206.

An adult person performs around 23,000 inhalations and exhalations a day.

The smallest cells in a man’s body are sperm cells.

There are about 40,000 bacteria in the human mouth.

The human eye can distinguish 10 million different colours.

If you were locked in a completely sealed room, you would not die due to a lack of air, but from carbon dioxide poisoning.

Our eyes remain the same size as they were at birth, but our nose and ears never stop growing.

Bones are about 5 times stronger than steel.

It is impossible to sneeze with your eyes open.

A person would die quicker from a total lack of sleep than from hunger. Death would occur after ten days without sleep, whereas from hunger it would take several weeks.

Just like finger prints, tooth prints are unique to each individual.

The average person only brushes for 45 to 70 seconds a day, the recommended amount of time is 2-3 minutes.

Teeth start to form even before you are born—milk teeth or baby teeth start to form when the baby is in the womb, but they come through when the child is between 6-12 months old.

If you get your tooth knocked out, put it in milk and hold it in your mouth—this will help your tooth to survive longer. Make sure you see a dentist right away.

Kids laugh around 400 times a day, adults just 15 times a day.

Hope you enjoyed.