Top most Human body interesting fact.

FACTS

 FACT  1.

Cornea, the transparent front part of the eye is the only part with no blood supply and it gets oxygen directly from the air.

 

FACT  2.

The fingernails grow faster than toenails and the nail on the middle finger grows faster than the other fingernails. The middle fingernail grows faster than the other fingernails.

 

FACT 3.

The complete lifespan of a single hair follicle is about 3 to 7 years. The dark color of a hair helps in finding the dense and a total number of hair follicles in our head.

 

FACT 4.

Your skin is home to more than 1,000 species of bacteria

 

FACT 5.

The female egg is the largest cell in the human body and the male sperm is the smallest.

 

FACT 6.

The largest bone in the human body is the femur, also known as the thigh bone. The smallest bone is the stirrup bone, which is located inside your ear drum.

 

FACT 7.

The tongue is covered in about 8,000 taste-buds, each containing up to 100 cells helping you taste your food!

 

FACT 8.

Dreams are believed to be a combination of imagination, phycological factors, and neurological factors. They prove that your brain is working even when you are sleeping.

 

FACT 9.

The brain can’t feel pain. It interprets pain signals sent to it, but it does not feel pain.

 

FACT 10.

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!

FACT 11.

Adult lungs have a surface area of around 70 square metres.

 

FACT12.

Your left and right lungs aren’t exactly the same. The lung on the left side of your body is divided into two lobes while the lung on your right side is divided into three. The left lung is also slightly smaller, allowing room for your heart.

 

FACT 13.

Human lungs contain almost 1,500 miles of airways and over 300 million alveoli.

 

FACT 14.

 An average person breathes in around 11,000 litres of air every day.

 

FACT 16.

 Your sense of smell is around 10,000 times more sensitive than your sense of taste.

 

FACT 17.

 Around 80 per cent of what we think is taste is actually smell. Flavor, is a combination of taste and smell perception.

 

FACT 18.

 The brain uses over a quarter of the oxygen used by the human body.

 

FACT 19.

 The brain of an adult human weighs around 3 pounds (1.5 kg). Although it makes up just 2 per cent of the body’s weight, it uses around 20 per cent of its energy.

 

FACT 20.

 If you smoothed out all of the wrinkles in your brain, it would lay flat the size of a pillowcase.

 

FACT 21.

 Your heart beats around 100,000 times a day, 365,00,000 times a year and over a billion times if you live beyond 30.

 

FACT 22.

 Grouping human blood types can be a difficult process and there are currently around 30 recognised blood types (or blood groups). You might be familiar with the more simplified “ABO” system which categorises blood types under O, A, B and AB.

 

FACT 23.

 When listening to music, your heartbeat will sync with the rhythm.

 

FACT 24.

 An healthy adult human heart beats about 75 times on average in a minute.

 

FACT 25.

 In one year, a human heart would pump enough blood to fill an Olympic size pool.

 

FACT 26.

 If all the blood vessels in the human body were laid end to end, they would encircle the Earth four times.

 

FACT 27.

 Skin is the human body’s largest organ

 

FACT 28.

 The outer layer of your skin is the epidermis, it is found thickest on the palms of your hands and soles of your feet (around 1.5 mm thick).

 

FACT 29.

 A large amount of the dust in your home is actually dead skin. Humans shed about 600,000 particles of skin every hour.

 

FACT 30.

 Humans have a stage of sleep that features rapid eye movement (REM). REM sleep makes up around 25 per cent of total sleep time and is often when you have your most vivid dreams.

 

FACT 31.

 An eyelash lives for about 150 days before it falls out.

 

FACT 32.

 The smallest bone found in the human body is located in the middle ear. The staples (or stirrup) bone is only 2.8 millimetres long.

 

FACT 33.

 The femur (thigh bone) is the longest bone in the human body.

 

FACT 34.

 As well as having unique fingerprints, humans also have unique tongue prints.

 

FACT 35.

 Goose bumps evolved to make our ancestors’ hair stand up, making them appear more threatening to predators.

 

FACT 36.

 Humans are the only animals with chins.

 

FACT 37.

 Blushing is caused by a rush of adrenaline.

 

FACT 38.

 The cornea is the only part of the body with no blood supply – it gets its oxygen directly from the air.

 

FACT 39.

 The human body contains enough fat to make seven bars of soap.

 

FACT 40.

 Between birth and death, the human body goes from having 300 bones, to just 206.

 

FACT 41.

 The small intestine is roughly 23 feet long.

 

FACT 42.

 An average sized man eats about 33 tons of food in his/her life time which is about the weight of six elephants.

 

FACT 43.

Nephrons, the kidney’s filtering units, clean the blood in the human body in about 45 minutes and send about six cups of urine (2000 ml) to the bladder every day.

 

FACT 44.

 One quarter of your bones are in your feet.

 

FACT 45.

 You can’t breathe and swallow at the same time.

 

FACT 46.

The average person produces enough saliva in their lifetime to fill two swimming pools.

 

FACT 47.

 There are about ten thousand taste buds on the human tongue and in general girls have more taste buds than boys!

 

FACT 48.

 While awake, your brain produces enough electricity to power a lightbulb.

 

FACT 49.

 The left side of your brain controls the right side of your body and right side of your brain controls the left side of your body.

 

FACT 50.

 In camera terms, the human eye is about 576 megapixels.

 

FACT 51.

 Our brain is programmed to erect the inverted image formed on our retina by the convex eye lens. A newborn baby sees the world upside down till its brain starts erecting it.

 

FACT 52.

 You carry, on average, about four pounds of bacteria around in your body.

 

FACT 53.

 50 percent of your hand strength comes from your little finger.

 

FACT 54.

 Sometimes the pain from scratching makes your body release the pain-fighting chemical serotonin. It can make the itch feel even itchier.

 

FACT 55.

 As people get older, their skin gets thinner, drier, and less elastic, hence wrinkles start appearing.

 

FACT 56.

 An adult skin weighs around 3 to 4 kgs.

 

FACT 57.

 If you spread out your skin, it would measure around 20 square feet in size, about the same size as a child’s bed sheet.

 

FACT 58.

 Diaphragm, which is a thin membrane under the lungs, sometimes twitches, causing a sudden intake of air, which is interrupted by throat closing. This is what we call hiccups.

 

FACT 59.

 In case of injury under the skin the blood vessels break and spread into the tissues near the injury. The dark colour of the blood shows through the skin as bruise.

 

FACT 60.

 A running nose is the way our body flushes out germs from our nose while we catch cold and flu.

 

FACT 61.

 On average, human body contains enough iron to make a nail 2.5 cm (1 inch) long.

(Source: With inputs from allthatsinteresting.com, mentalfloss.com and The New Children’s Encyclopedia DK Publication.)