1. The only part of the
body that has no blood supply is the cornea of the eye.
It receives oxygen directly from the air.
2. The human brain has
a memory capacity which is the equivalent of more than four
terabytes on a hard drive.
3. A newborn child can
breathe and swallow at the same time for up to seven months.
4. Your skull is made
up of 29 different bones.
5. Nerve impulses sent from
the brain move at a speed of 274 km/h.
6. A single human brain
generates more electrical impulses in a day than all the telephones
of the world combined.
7. The average human body
contains enough sulfur 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.
8. The human heart pumps 182
million liters of blood during the average lifetime.
9. 50,000 cells in your
body died and were replaced by new ones while you were reading this
sentence.
10. The human embryo acquires
fingerprints within three months of conception.
11. Women’s hearts beat faster
than men’s.
12. A man named Charles
Osborne hiccupped for a total of 68 years.
13. Right-handed people live,
on average, nine years longer than left-handed people.
14. About two thirds
of people tilt their head to the right when kissing.
15. The average person
forgets 90% of their dreams.
16. The total length
of all the blood vessels in the human body is about 100,000 km.
17. On average,
a person’s respiration rate is one third higher in spring than
in autumn.
18. By the end
of a person’s life, they can recall, on average, around 150
trillion pieces of information.
19. We lose 80%
of our body heat from the head.
20. When you blush, your
stomach also turns red.
21. A feeling
of thirst occurs when water loss is equal to 1% of your
body weight. The loss of more than 5% can cause fainting, and more
than 10% causes death from dehydration.
22. At least 700 enzymes
are active in the human body.
23. Human beings are the only
living things which sleep on their backs.
24. The average four-year-old
child asks 450 questions a day.
25. Not only human beings, but
also koalas have unique finger prints.
26. Only 1% of the
bacteria can result in the human body becoming ill.
27. Everyone alive
on Earth could comfortably be placed into a cube with sides 1000
meters long.
28. The scientific name for the
belly button is the umbilicus.
29. Teeth are the only part
of the human body which cannot heal themselves.
30. On average,
a person needs seven minutes to fall asleep.
31. Right-handed people chew
most of their food on the right side of their mouth, whereas
left-handed people do so on the left.
32. Only 7% of people
are left-handed.
33. The fragrance
of apples and bananas can help a person to lose weight.
34. If allowed
to grow for their whole lifetime, the length of someone’s hair would
be about 725 kilometers.
35. Out of all the people
who can move their ears, only one third of them are able to move just
one ear.
36. During their lifetime,
a person will on average accidentally swallow eight small spiders.
37. The total weight
of the bacteria in the human body is 2 kg.
38. 99% of the calcium
contained in the human body is in one’s teeth.
39. Human lips are hundreds
of times more sensitive than the tips of a person’s fingers.
40. A kiss increases
a person’s pulse to 100 beats per minute or more.
41. The total strength
of masticatory muscles on one side of your jaw is equal
to 195 kilograms.
42. A person passes
on 278 different types of bacteria to another person when they
kiss them. Fortunately, 95% of them are not harmful.
43. Parthenophobia
is a fear of virgins.
44. If you collected all
the iron contained in the human body, you would get just a small cog,
big enough only for use in your watch.
45. There are more than 100
different viruses which cause a cold.
46. If someone kisses
another person for a certain amount of time, this is much more
effective in terms of hygiene than using chewing gum,
as it normalises the level of acidity in your oral
cavities.
47. You can lose 150 calories
per hour if you hit your head against the wall.
48. Human beings are the only
animals which can draw straight lines.
49. Human skin
is completely replaced about 1,000 times during a person’s lifetime.
50. A person who smokes
a pack of cigarettes a day is doing the equivalent
of drinking half a cup of tar a year.
51. Women blink about two times
less often than men.
52. The structure of the
human body contains only four minerals: apatite, aragonite, calcite, and
crystobalite.
53. A passionate kiss
causes the same chemical reactions in the brain that skydiving and firing
a gun do.
54. Men are officially
classified as dwarves if their height is below 1.3 m,
whereas for women the measure is 1.2 m.
55. Fingernails grow about four
times faster than your toenails.
56. People with blue eyes are
more sensitive to pain than others.
57. Nerve impulses in the
human body move at about 90 m/s.
58. 100,000 chemical reactions
occur in the human brain every second.
59. Everyone has dimples
on their lower back, but on some people they are more pronounced than
on others. They appear where the pelvis joins with the sacrum,
so their appearance makes sense.
60. If one identical twins
lacks a certain tooth, the other twin will not have that tooth either.
61. The surface area
of the human lungs is approximately equal to the area
of a tennis court.
62. During a person’s
lifetime, they spend about 2 weeks kissing.
63. The facial hair
of a blonde-haired man grows faster than that of a man with
dark hair.
64. Leukocytes in the
human body live for two to four days, and erythrocytes for three
to four months.
65. The strongest muscle
in the human body is the tongue.
66. The human heart
is approximately equal in size to that of a person’s
fist. An adult’s heart weights 220-260 grams.
67. 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.
68. At birth,
a child’s body is made up of around 300 bones. But
an adult has just 206.
69. During a person’s
lifetime, the small intestine is about 2.5 meters. After they die,
the muscles in the walls of their intestine relax, and it’s length
increases to 6 meters.
70. Your right lung can take
in more air than your left.
71. An adult person
performs around 23,000 inhalations and exhalations a day.
72. The smallest cells
in a man’s body are sperm cells.
73. There are about 40,000
bacteria in the human mouth.
74. Each of us has around
2,000 taste buds.
75. The human eye can
distinguish 10 million different colors.
76. The chemical compound
in the body which causes feelings of ecstasy (phenylethylamine)
is also contained in chocolate.
77. The human heart pumps blood
at such pressure that it would be able to raise blood
up to the fourth floor of a building.
78. A person burns more
calories when they are asleep than when they watch TV.
79. Children grow faster
in the spring.
80. Every year more than
2 million left-handed people die because of mistakes they make when
using machines designed for right-handed people.
81. It turns out that one
man in every three hundred is capable of satisfying themselves
orally.
82. A person uses
17 muscles when they smile, and 43 when they frown.
83. By the age
of 60 most people lose half of their taste buds.
84. The rate at which
a person’s hair grows doubles during an airplane flight.
85. One percent of people
can see infra-red light and 1% can see ultra violet radiation.
86. If you were locked
in a completely sealed room, you would not die due
to a lack of air, but from carbon dioxide poisoning.
87. Statistically, only one
person out of two billion reaches the age of 116 years old.
88. On average,
a person says 4,800 words in 24 hours.
89. 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.
90. Our eyes remain the same
size as they were at birth, but our nose and ears never stop growing.
91. In the morning,
a person is about 8 millimeters taller than in the evening.
92. The muscles which help your
eyes to focus complete around 100,000 movements a day. In order
to make your leg muscles do the same amount of movements, you
would need to walk 80 kilometers.
93. A cough amounts
to an explosive charge of air which moves at speeds
up to 60 miles per hour.
94. According to German
researchers, the risk of having heart attack is higher on Monday
than on any other day of the week.
95. Bones are about
5 times stronger than steel.
96. It is impossible
to sneeze with your eyes open.
97. Ingrown toenails are
hereditary.
98. 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.
99. The average life expectancy
is 2,475,576,000 seconds. During this time we pronounce,
on average, around 123,205,750 words.
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