UNKNOWN FACTS OF HUMAN BODY

236 FACTS OF HUMAN BODY

1. The average red blood cell lives for 120 days.
2. There are 2.5 trillion (give or take) of red blood cells in your body at any moment. To maintain this number, about two and a half million new ones need to be produced every second by your bone marrow.That's like a new population of the city of Toronto every second.
3. Considering all the tissues and cells in your body, 25 million new cells are being produced each second. That's a little less than the population of Canada - every second !
4. A red blood cell can circumnavigate your body in under 20 seconds.
5. Nerve Impulses travel at over 400 km/hr (249 mi/hr).
6. A sneeze generates a wind of 166 km/hr (100 mi/hr), and a cough moves out at 100 km/hr (60 mi/hr).
7. Our heart beats around 100,00 times every day or about 30 million times in a year.
8. Our blood is on a 60,000-mile journey per day.
9. Our eyes can distinguish up to ten million colour surfaces and take in more information than the largest telescope known to man.
10. Our lungs inhale over two million liters of air every day, without even thinking. Their surface area is large enough to cover one side of a tennis court.
11. We give birth to over 200 billion red cells every day
12. When we touch something, we send a message to our brain at 124 mph
13. We exercise at least 36 muscles when we smile.
14. We are about 70 percent water.
15. We make around 1 to 1.6 litres of saliva a day.
16. Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities.
17. In one square inch of our hand we have nine feet of blood vessels, 600 pain sensors, 9000 nerve endings,36 heat sensors and 75 pressure sensors.
18. We have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and silicon in our bodies.
19. It is believed that the main purpose of eyebrows is to keep sweat out of the eyes.
20. A person can expect to breathe in about 45 pounds of dust over his/her lifetime 
21. 21.There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.
22. From the age of thirty, humans gradually begin to shrink in size.
23. Your body contains enough iron to make a spike strong enough to hold your weight.
24. The surface area of a human lung is equal to that of a tennis court.
25. Most people have lost fifty per cent of their taste buds by the time they reach the age of sixty.
26. The amount of carbon in the human body is enough to fill about 9,000 'lead' pencils.
27. One square inch of human skin contains 625 sweat glands.
28. When you blush, your stomach lining also reddens.
29. The human body has less muscles in it than a caterpillar.
30. If you could save all the times your eyes blink in one life time and use them all at once you would see blackness for 1.2 years!
31. The life span of a taste bud is ten days.
32. It's impossible to sneeze with your eyes open.
33. Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body.
34. The aorta, the largest artery in the body, is almost the diameter of a garden hose.
35. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.
36. Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute.
37. The heart pumps about 1 million barrels of blood during an average lifetime - that's enough to fill 2 oil super tankers!
38. Babies start dreaming even before they're born.
39. Humans are the only primates that don't have pigment in the palms of their hands.
40. 10% of human dry weight comes from bacteria. 
41. There is more bacteria in your mouth than the human population of the United States and Canada combined .
42. Very square inch of the human body has an average of 32 million bacteria on it.
43. Fetus acquires fingerprints at the age of three months
44. You sit on the biggest muscle in your body, the gluteus maximus a.k.a. the butt. Each of the two cheeky muscles tips the scales at about two pounds (not including the overlying fat layer).
45. The tiniest muscle, the stapedius of the middle ear , is just one-fifth of an inch long.
46. The average human head weighs about 10 pounds.
47. The average human brain weighs about 3 pounds.
48. The DNA helix measures 80 billionths of an inch wide.
49. Your eyeballs are three and a half percent salt.
50. If Barbie were life-size, her measurements would be 39-23-33. She would stand seven feet, two inches tall and have a neck twice the length of a normal human's neck.
51. It takes about 20 seconds for a red blood cell to circle the whole body.
52. An average human drinks about 16,000 gallons of water in a lifetime.
53. Beards are the fastest growing hairs on the human body. If the average man never trimmed his beard, it would grow to nearly 30 feet long in his lifetime.
54. Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year. By 70 years of age, an average person will have lost 105 pounds of skin.
55. It only takes 7 pounds of pressure to rip your ear off.
56. Human teeth are almost as hard as rocks.
57. You burn more calories while sleeping than you do when watching television.
58. Our eyes never grow, and our nose and ears never stop growing
59. The thumbnail grows the slowest; the middle nail grows the fastest
60. Children grow faster in the springtime.
61. Women blink nearly twice as much as men.
62. You can only smell 1/20th as well as a dog.
63. People are the only animals in the world who cry tears.
64. In your very own lifetime, you'll produce enough spit to fill two swimming pools.
65. You breathe in about 7 quarts of air every minute. We breathe 13 pints of air every minute.
66. Your dad sweats enough each day to fill up a 6 pack of soda cans...and then some.
67. Every time you lick a stamp, you're consuming 1/10 of a calorie.
68. If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.
69. If you toot consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb.
70. The human heart creates enough pressure when it pumps blood, that it could squirt blood 30 feet.
71. Banging your head against a wall uses 150 calories an hour.
72. On average people fear spiders more than they do death.
73. Americans on the average eat 18 acres of pizza every day.
74. Did you know that you are more likely to be killed by a champagne cork than by a poisonous spider?
75. Right-handed people live, on average, nine years longer than left-handed people do.
76. If you blink one eye you move over 200 muscles.
77. The length of your foot is the same as that of your forearm between your wrist and the inside of your elbow.
78. In 24 hours, the blood in the body travels a total of 12,000 miles - that's four times the width of North America.
79. The human gut contains about 1kg (2.2 lbs) of bacteria. In fact, there are more bacteria growing in and on the body than there are human cells.
80. Humans have more facial muscles than any other animal on earth - 22 on each side of the face.
81. Before their first birthday, average babies will have dribbled 255 pints of saliva. By the time they're two years old, they will have crawled 93 miles.
82. The human hand contains three main nerves, two major arteries and 27 different bones - more of the body is devoted to controlling the hands than any other part of the body.
83. In the average lifetime, we spend five years eating and we consume around 7,000 times our own weight in food.
84. When we go to sleep and enter REM (Rapid Eye Movement),our bodies become completely paralyzed as areas of the brain that control movement are de-activated. It is this that stops us falling out of bed.
85. By the time a woman has reached her 60s, she will have released around 450 baby making eggs
86. When full, the human bladder can hold two pints of urine.
87. In a lifetime, a human being will grow six feet of nose hair and shed 42 lbs of dead skin.
88. A human being can look forward to having sex an average of 2,580 times with five different partners.
89. Skin can now be artificially grown.One amazing result of this is that the skin from one hand could be grown into enough to cover six football pitches.
90. There are 137 million light sensitive cells in the eye's retina and the fluid that fills the eye is changed 15 times a day.
91. Humans and dolphins are the only species that have sex for pleasure.
92. The average person falls asleep in seven minutes.
93. During your lifetime, you'll eat about 60,000 pounds of food, that's the weight of about 6 elephants!
94. In space, astronauts cannot cry, because there is no gravity, so the tears can't flow!
95. Your ribs move about 5 million times a year, every time you breathe!
96. A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realises it's there.
97. At birth we have over 300 bones. As we grow up, some of the bones begin to fuse together as a result an adult has only 206 bones.
98. The femur/thigh bone is the longest bone in our body, it is about a quarter of ones height.
99. The human body has 230 movable and semi- movable joints
100. Our Brain has over 100 billion nerve cells.
101. A newborn babys brain grows almost 3 times during their first year of life.
102. The left side of human brain controls the right side of the body and the right side of the brain controls the left side of the body.
103. The length of human blood vessel is such that it circles the globe 2 ½ times.
104. The human heart beats 30 million times a year.
105. 80 hairs are likely to fall every day.
106. Uncooked food digests two times faster than cooked food.
107. Water is the major source of energy than food.
108. Heart circulates blood in your body about 1000 times each day.
109. Men lose about 40 hairs in a day and women lose 70 hairs in a day. 
110. Your blood has same amount of salts in it as an ocean has. 
111. There are 500 hairs in an eyebrow. 
112. The average human body contains approximately 100 billion nerve cells.
113. You are taller in the morning than you are at night. 
114. Bones are 4 times stronger than concrete. 
115. Average life span of a taste bud is only 10 days.
116. You are born without knee caps and they don’t appear until age of 2 to 6 years. 
117. Children grow faster in springtime 
118. Eyes stay the same size throughout life but nose and ears never stop growing. 
119. We born with 300 bones but end up with 206 bones when we are adult. 
120. Human skull is made up of 26 different bones. 
121. Hair is made of same substance as fingernails.
122. Our entire body functions stop when we sneeze, even your heart beat. 
123. Tongue is the strongest muscle in human body. 
124. Typical person goes to bathroom six times a day. 
125. Food takes 7 seconds to reach stomach from mouth. 
126. Children have more taste buds than adults. 
127. Sneeze blows air out of nose at the speed of 100 miles per hour. 
128. Largest muscle in your body is one on which you are sitting on. 
129. Smallest bone of body is in ears.
130. Human body needs natural Sodium not Sodium Chloride, salt.  
131. If your skin is burning in sun light your body water index is low. .  
132. Eyelashes last about 150 days.
133. After clearing salt and oil from the human body, all other organs rejuvenate with liver. 
134. Diabetes is hereditary not because of zeans, but because our food habits.
135. Salt food is the major cause of many diseases including diabetes. 
136. Adults, above 11 yrs, should not use more than 1500 mg sodium 0.75 teaspoon, a day. 
137. Salt is the main cause of swelling, fluid retention, infections in the lungs and kidneys. 
138. After seven years human being can not digest even his own mother's milk.  
139. Human taste buds would be replaced every fortnight. 
140. All animal fat including milk will thicken our blood vessels 
141. Human body requires natural Sodium not the Sodium Chloride we consume. 
142. The muscles of the eye move more than 100,000 times a day.
143. We breathe 13 pints of air every minute.
144. Human skin has a tendency to shed 40 pounds of skin in lifetime.
145. Human kidneys have about 1 million nephrons that filters out liquids and wastes.
146. Fingernails contain keratin and they seem to be strongest component in the human body.
147. The human skin contains 45 miles of nerves.
148. Most people blink about 25 times per minute.
149. For every 2 weeks, the human stomach produces new layer of mucous lining, otherwise the stomach will digest itself.
150. Every person has a unique tongue print.
151. The tooth is the only part of the human body that cannot heal and repair by its own.
152. In one square inch of skin there are 4 yards of nerve fibers.
153. The human ear can distinguish between hundreds of thousands of different sounds.
154. On an average the human scalp has about 100,000 hairs.
155. Nails of toes or fingers take about 6 months to grow from base to tip.
156. A square inch of skin consists of 1300 nerve cells.
157. The adult human brain is about 2 % of total body weight.
158. On an average 1.7 liters of saliva produces each day.
159. In one square inch of skin, there are 3 million cells.
160. The human body consists of over 600 muscles.
161. As we get older, the brain loses almost one gram per year.
162. Esophagus/or food pipe, which is the passage for the food we eat to the stomach, is approximately 25 cm long.
163. A square inch of skin consists of three yards of blood vessel.
164. There are about 13, 500,00 neurons in the human spinal cord.
165. The human tongue has 10,000 taste buds.
166. The cells of taste buds are constantly being renewed, roughly on every ten hours.
167. An average human head weighs about 8 pounds.
168. The human eyeball is 24.5 mm long.
169. Taste buds are present inside the mouth and also at the roof of the mouth.
170. The human spinal cord is 45 cm long in men and 43 cm long in women.
171. The weight of human cerebellum is 150g.
172. The strongest muscles of the human body are masseters, which are present on either side of the mouth.
173. The human liver performs 500 different functions.
174. The heart muscles will stop working only when we die.
175. Children have more sensitive ears than adults.
176. Shivering is a way of trying to keep our body warm.
177. Humans have the ability to distinguish 4,000 to 10, 000 smells.
178. Every hour, the human eye can process 36,000 bits of information.
179. Nails and corneas are the only two tissues in the body that do not receive oxygen from blood.
180. The length of the finger indicates how fast the nail grows. The nail of the middle finger grows faster than others.
181. The human ears can hear in the frequency of 1,000 to 50, 000 hertz.
182. The total surface area of the human brain is about 25, 000 square cms.
183. Sound that is above 130 decibels can cause pain to our ears.
184. There are around 100 receptors in each of our fingertips.
185. The weight of skin in a human adult is 8 to 10 pounds.
186. The middle part of the back is the least sensitive part of our body.
187. Children have better sense of smell than adults.
188. The eyelashes shed by a human in his entire life is of 30 m of length.
189. After death, the body starts to dry out creating an illusion that the nails and hairs are growing even after death
190. The base of the spinal cord has a cluster of nerves, which are most sensitive.
191. Platelets, which are one of the constituents of the blood are produced at the rate of one hundred billion per day.
192. The sense of taste is the weakest of the five senses.
193. Humans have the ability to differentiate about 10, 000 odor.
194. It takes time for the newborn baby to learn to turn the pictures right side up, as it sees the world upside down in the beginning.
195. If human sense of smell is affected, sense of taste is also affected as the brain interprets signals from the nose and tongue.
196. There are around 1,200,000 optic fibers in the human eye.
197. The lens of the human eye is composed of 65 % of water and 3 % of protein.
198. We shut our eyes for 0.3 seconds, when we blink.
199. Eyes are the only part of the human body that functions at 100 percent ability at any movement.
200. A drop of blood contains 250 million cells.
201. The liver is the largest and heaviest internal organ of the body and weighs about 1.6 kilos.
202. In the womb, the baby's body is covered by a thin layer of hair but as soon as the baby is born it disappears.
203. Babies crawl to an average of 200 m a day.
204. The only joint less bone in the human body is the hyoid bone, which is present in the throat area.
205. Eating Break fast helps to burn 5 to 20 percent of calories throughout the day.
206. The surface of human tongue is covered with 100 of tiny structures called papillae.
207. On an average, a persons left hand does 56 % of typing.
208. A person can live without food for about a month, but only a week without water.
209. Threshold pain of women is 9 times stronger than men.
210. The palms of the hands and soles of the feet contain more sweat glands than other parts of the body.
211. 10 % of men and 8 % of women are left-handed.
212. An average human body contains enough amount of fat to make seven bars of soap.
213. The human body releases growth hormones during sleep.
214. Red blood cells are about seven micrometer in diameter.
215. The thighbone is so strong that it withstands the axial load of about 1600-1800 kilos.
216. An average adult male brain weighs about 1375 grams.
217. On an average the weight of an adult female brain is about 1275 grams.
218. Only four percent of the brains cells work and the remaining cells are kept in reserve.
219. The human eye has 110-130 million receptors to perceive light.
220. The human eye contains five to seven million receptors for color perception.
221. The human eye cannot perceive a motionless image.
222. The average life span of a sperm is about 36 hours.
223. The life span of an ovule is about 12 - 24 hours.
224. Only one person in two billion will live for more than 115 years of life.
225. On an average, we speak about 5,000 words per day.
226. Liver is the only organ of the body, which regenerates itself completely even after being removed completely.
227. The human heart pumps 6,000 liters of blood daily through a man lifetime.
228. The human brain is capable of creating more ideas equivalent to that of the atoms of the universe.
229. Hair is the fastest growing tissue in the body, the next being bone marrow.
230. On an average, in an adult scalp 35m of hair fiber is produced every day.
231. The maximum length of hair can be 70 to 90 cms.
232. The life span of hair is two to seven years.
233. Frequent washing of hair does not cause hair loss.
234. Brain uses 20 % of our body energy and makes up only 2 % of our body weight.
235. Any damage to brain cells cannot be repaired completely.
236. Human brain stops growing at the age of 18.