99 Interesting Facts About the Human Body

99: The average life expectancy in seconds is 2,475,576,000. We pronounce, on average, around 123,205,750 words and have sex 4,239 times during the average life expectancy.

⇒ 98: If you have ingrown toenails, that means you inherited it from someone in your family.

⇒ 97: Bones are approximately 5 times stronger than steel.

⇒ 96: Sleep deprivation can lead to quicker death than going without food. While it takes several weeks to die of hunger, it takes only ten days of going without sleep to lead to a person’s death.

⇒ 95: Try sneezing with your eyes open. It’s impossible!



⇒ 94: The air you blow out when you cough has a speed of up to 60 miles an hour.

⇒ 93: The risk of having a heart attack is higher on Monday than the rest of the days, according to German researchers.

⇒ 92: A person is taller by 8 mm in the morning than in the evening.

⇒ 91: Our nose and ears grow throughout our lives.

⇒ 90: The muscles in our eyes that help us to focus make 100,000 movements in a day. For the same number of movements in our leg muscles, we’ll need to walk 80 miles.



⇒ 89: The retinas inside the eye contain 137 million light-sensitive cells of which 130 million are for black and white vision and 7 million are for seeing in color. The retinas cover a surface area of 650 square mm in the eye.

⇒ 88: We uses fewer muscles when we smile – 17 – and a lot more when we frown – 43.

⇒ 87: In a day, we say 4,800 words on average.

⇒ 86: Only one person out of two billion reaches an age of 116 years.



⇒ 85: You would die from carbon dioxide poisoning and not from lack of air if you’re locked in a sealed room.

⇒ 84: Most people lose half of their taste buds by the time they reach 60.

⇒ 83: 1% of people can see UV radiation while another 1% can see infrared light.

⇒ 82: When you’re on an airplane, you hair grows at twice the rate than under normal circumstances.

⇒ 81: Chocolates have the same chemical compound that we have in our bodies that gives feelings of ecstasy – phenylethylamine.



⇒ 80: Out of every three hundred, one man can satisfy himself orally.

⇒ 79: In spring, children grow faster.

⇒ 78: Two million left-handed people die annually owing to machine-related accidents. These machines are made for right-handed people.

⇒ 77: The pressure with which the heart pumps blood is enough to raise the blood to the level of four floors.

⇒ 76: It’s better to sleep than watch TV if you want to burn more calories.



⇒ 75: While an adult has 206 bones in the body, a newborn child has 300.

⇒ 74: Our eye can distinguish between ten million different colors and shades.

⇒ 73: The small intestine measures 2.5 meters in our lifetime but when it relaxes after death, it stretches up to 6 meters.

⇒ 72: We have around 2,000 taste buds.

⇒ 71: The right lung is equipped to take in more air than the left.

⇒ 70: We breathe in and out 23,000 times in a day.



⇒ 69: Our mouth contains about 40,000 bacteria.

⇒ 68: The sperm cells are the smallest in a man’s body.

⇒ 67: An average person spends two weeks kissing in his entire life span.

⇒ 66: We are born with 14 billion cells in the brain but after 25 years, the number of cells decreases by 100,000 every day. In a minute within which we can read a page, 70 brain cells die. The decreasing rate grows sharply after 40 years. After 50 years, our brain nerve cells shrink and the brain gets smaller.

⇒ 65: The tongue is the strongest muscle in our body.

⇒ 64: The facial hair of a blonde man grows faster than that of men with dark hair.



⇒ 63: The size of an adult’s fist is about the same as the size of the heart. The weight of the heart is 220-260 grams in an adult.

⇒ 62: While leukocytes or white blood cells live in the human body for two to four days, erythrocytes or red blood cells live for three to four months.

⇒ 61: The surface area of a tennis court and the human lungs is the same.

⇒ 60: The nails on our fingers grow 4 times faster than that on our toes.

⇒ 59: Blue-eyed people feel more pain than others.

⇒ 58: If one tooth is missing in one identical twin, the same tooth will be missing in the other twin also.

⇒ 57: Nerve impulses in our body move at the speed of 9m/second.

⇒ 56: Some people have more pronounced dimples on the lower back than others.

⇒ 55: In the human brain, 100,000 chemical reactions take place every second.

⇒ 54: Over the lifetime of a human being, the skin gets completely replaced 1,000 times.

⇒ 53: You get the same chemical reactions in the brain from passionate kissing, sky diving or firing a gun.

⇒ 52: Men measuring less than 1.3 meters in height are officially declared dwarves while for women the cut-off point is 1.2 meters.



⇒ 51: Women blink two times less often than men.

⇒ 50: Humans are the only beings capable of drawing straight lines.

⇒ 49: The human body structure has four minerals: apatite, aragonite, calcite, and crystobalite

⇒ 48: A pack of cigarettes a day is equivalent to drinking half a cup of tar every year.

⇒ 47: A person can pass on 278 different types of bacteria to another person while kissing but 95% of them are not harmful.

⇒ 46: Hitting your head against a wall for an hour can help lose 150 calories.

⇒ 45: Cold is caused by 100 different viruses.

⇒ 44: Kissing is more effective in maintaining oral hygiene than chewing gum as it normalizes the acid level in the oral cavities.

⇒ 43: All the iron in the human body is enough to run a watch.

⇒ 42: If you fear virgins, then you have a condition called Parthenophobia.

⇒ 41: A person can swallow eight small spiders accidentally during their lifetime.

⇒ 40: A kiss can increase the heart rate of a person to 100 beats per minute or more.

⇒ 39: Of all the persons who can move both their ears, one-third of them can move only one ear.

⇒ 38: Our teeth have 99% of the total body calcium content.

⇒ 37: The muscles on only one side of our jaw have the strength of 195 kilograms.

⇒ 36: The weight of all bacteria in the human body is around 2kg.

⇒ 35: The human lips are much more sensitive than the finger tips.

⇒ 34: If you want to lose weight, just smell bananas and apples.

⇒ 33: Umbilicus is the scientific name for the belly button.

⇒ 32: Only 7% of people in the world are left-handed.

⇒ 31: If we don’t cut our hair throughout our lives, it can reach a length of 725 km.

⇒ 30: Teeth are the only part of our body that cannot heal itself.



⇒ 29: Right-handed people chew on the right side of their mouth and left-handed people tend to chew on their left.

⇒ 28: A person needs, on average, 7 minutes before they fall asleep.

⇒ 27: In the human body. At least 700 enzymes are active at the same time.

⇒ 26: Koala bears also have unique fingerprints like humans.

⇒ 25: A cube with sides of 1000 meters long can accommodate all the people living on Earth.

⇒ 24: The only species to sleep on their back is the human species.



⇒ 23: The human body falling ill can be caused by just 1% of the bacteria.

⇒ 22: A four-year-old child can ask up to 450 questions on average per day.

⇒ 21: We feel thirsty when water loss is equal to 1% of our body weight. We can faint when the loss is more than 5% and we can even die when we lose more than 10%.

⇒ 20: Right-handed people live longer by 9 years than left-handed people.

⇒ 19: Our stomach turns red when we blush.



⇒ 18: The average person cannot recall 90% of their dreams.

⇒ 17: All the blood vessels in the human body can stretch to 100,000 km.

⇒ 16: Charles Osborne was a man who hiccupped continuously for 68 years.

⇒ 15: 80% of the body heat is lost through the head.

⇒ 14: When kissing, two-thirds of people tilt their head to the right.



⇒ 13: 150 trillion pieces of information can be recalled on average by a person at the end of their lifetime.

⇒ 12: On average, a person’s respiration rate is one third higher in spring than in autumn.

⇒ 11: The heartbeat is faster in women than in men.

⇒ 10: It takes less than half a minute for 50,000 cells in the human body to be destroyed and replaced.

⇒ 9: 182 million liters of blood are pumped by the human heart on average during a lifetime.

⇒ 8: Within three months of conception, the human embryo develops unique fingerprints.

⇒ 7: More electrical impulses are generated by a single human brain than all the telephones in the world put together.

⇒ 6: The human skull has 29 different bones.



⇒ 5: The average human body contains enough sulphur to kill all the fleas on the average dog, enough carbon to make 900 pencils, enough potassium to fire a toy cannon, enough fat to make seven bars of soap and enough water to fill a 50-litre barrel.

⇒ 4: Nerve impulses from the brain travel at a speed of 274km/hour.

⇒ 3: The cornea of the eye is the only part of the body that gets a direct supply of oxygen. Other body parts receive oxygen through the blood.

⇒ 2: A human newborn can breathe and swallow at the same time for up to seven months of age.

⇒ 1: The human brain can store memory equivalent to more than 4 terabytes on a hard disk.