Fascinating Facts About The Human Body

Fascinating Facts About The Human Body

Tags: Facts Biology Chemistry Chemical Compound Body Heat Head Human Skull Bones Chemical Reactions Brain Nerve Impulses Electrical Life Cells Neurons Recall Information Cornea Eye Blood Oxygen Air Colours Infra Red Light Ultra Violet Radiation Retinas Sensitive Vision Nose Ears Child Breathe Swallow Viruses Cold Teeth Heal Calcium Hand Chew Food Mouth Masticatory Muscles Jaw Twins Sneeze Cough Bacteria Lips Sensitive Finger Prints Nails Toes Tongue Taste Buds Smile Hiccup Hearts Pressure Inhalations Exhalations Embryo Conception Skin Enzymes Minerals Apatite Aragonite Calcite Crystobalite Living Animals Leukocytes Erythrocytes Ecstasy Phenylethylamine Sperm Calories Carbon Dioxide Poisoning Sleep Hunger Death Thirsty Water Weight Fainting Dehydration

The human body is an amazing and marvelous machine. It is clearly the most complex organism on our planet. It is a mechanism with billions of microscopic parts, all moving in tandem and making the body function as one single organism. However, the truth is far more interesting. Each microscopic part of the human body has its own identity and it works in synchrony with others in an organised manner to benefit the overall structure. While the body is a single structure, it is actually made up of billions of smaller structures covering cells, tissues, organs and systems (like nervous and muscular systems). Many exciting discoveries in various fields of science are being played out in the human body. We do not realise the marvel and mystery of our own bodies but when we stop to think about it, there are so many astounding, astonishing and stunning facts about it.

1. Typically, we lose 80% of our body heat from the head.
2. The human skull is made up of 29 different bones.
3. 100,000 chemical reactions occur in the human brain every second.
4. The nerve impulses from the brain move at a speed of 274 KMpH.
5. Nerve impulses in the human body move at about 90 m/s.
6. A single human brain generates more electrical impulses in a day than all the telephones of the world combined.
7. At birth, there are 14 billion cells in the human brain. This number does not increase throughout a person’s lifetime. After 25 years, the number of cells falls by 100,000 every day. About 70 cells die in the minute it takes you to read a page in a book. After 40 years, the decline of the brain accelerates sharply, and after 50 years neurons (that is, nerve cells) shrink and the brain gets smaller.
8. By the end of a person’s life, they can recall, on average, around 150 trillion pieces of information.
9. The cornea of the eye is the only part of the body that has no blood supply. It receives oxygen directly from the air.
10. The human eye can distinguish 10 million different colours.
11. One percent of people can see infra-red light and 1% can see ultra violet radiation.
12. The retinas inside the eye cover about 650 square mm and contain 137 million light-sensitive cells: 130 million are for black and white vision and 7 million are for helping you see in colour.
13. Our eyes remain the same size as they were at birth, but our nose and ears never stop growing.
14. A newborn child can breathe and swallow at the same time for up to 7 months.
15. At birth, a child’s body is made up of around 300 bones. But an adult has just 206.
16. Bones are about 5 times stronger than steel.
17. There are more than 100 different viruses which cause a cold.
18. Teeth are the only part of the human body which cannot heal themselves.
19. 99% of the calcium contained in the human body is in one’s teeth.
20. Right-handed people chew most of their food on the right side of their mouth, whereas left-handed people do so on the left.
21. The total strength of masticatory muscles on one side of your jaw is equal to 195 kilograms.
22. If one identical twins lacks a certain tooth, the other twin will not have that tooth either.
23. It is impossible to sneeze with your eyes open.
24. A cough amounts to an explosive charge of air which moves at speeds up to 60 miles per hour.
25. There are about 40,000 bacteria in the human mouth.

Fascinating Facts About The Human Body

1. Human lips are hundreds of times more sensitive than the tips of a person’s fingers.
2. The strongest muscle in the human body is the tongue.
3. Each of us has around 2,000 taste buds. By the age of 60 most people lose half of their taste buds.
4. A person uses 17 muscles when they smile, and 43 when they frown.
5. A man named Charles Osborne hiccupped for a total of 68 years.
6. The hearts of women beat faster than the hearts of men.
7. The human heart pumps 182 million litres of blood during an average lifetime.
8. The human heart pumps blood at such pressure that it would be able to raise blood up to the fourth floor of a building.
9. An adult performs around 23,000 inhalations and exhalations a day.
10. The total length of all the blood vessels in the human body is about 100,000 KMs.
11. A human embryo acquires fingerprints within 3 months of conception.
12. Not only human beings, but also koalas have unique finger prints.
13. Fingernails grow about four times faster than your toenails.
14. Every year more than 2 million left-handed people die because of mistakes they make when using machines designed for right-handed people.
15. Human skin is completely replaced about 1,000 times during a person’s lifetime.
16. At least 700 enzymes are active in the human body.
17. The structure of the human body contains only four minerals: apatite, aragonite, calcite, and crystobalite.
18. Human beings are the only living things which sleep on their backs.
19. Only 7% of people are left-handed.
20. Only 1% of the bacteria can result in the human body becoming ill.
21. The total weight of the bacteria in the human body is 2 kg.
22. Human beings are the only animals which can draw straight lines.
23. A person who smokes a pack of cigarettes a day is doing the equivalent of drinking half a cup of tar a year.
24. Leukocytes in the human body live for two to four days, and erythrocytes for three to four months.
25. The chemical compound in the body which causes feelings of ecstasy (phenylethylamine) is also contained in chocolate.
26. The smallest cells in a man’s body are sperm cells.
27. A person burns more calories when they are asleep than when they watch TV.
28. If you were locked in a completely sealed room, you would not die due to a lack of air, but from carbon dioxide poisoning.
29. 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.
30. You feel thirsty when water loss is equal to 1% of your body weight. When water loss is more than 5%, it can cause fainting and if it drops to more than 10%, then death from dehydration follows.

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