Sense organs interesting facts. Incredible facts about the human body. Sense Organs Facts About Our Sense Organs
1. Nerve impulses move at a speed of 270 km/h.
2. The brain requires the same amount of energy to work as a 10-watt light bulb.
3. Our brain can process more than 100 trillion operations in one second.
4. The brain uses 20% of all oxygen that enters the circulatory system.
5. At night, the brain is much more active than during the day.
6. Scientists say that the higher the IQ level, the more often people dream.
7. Neurons continue to grow throughout a person's life.
8. Information passes through different neurons at different speeds.
9. The brain itself does not feel pain.
10. The brain is 80% water.
Hair and nails
The subject of eternal ladies' anxiety. However, men are increasingly starting to take care of them too.
11. Facial hair grows faster than anywhere else.
12. Every day a person loses an average of 60 to 100 hairs.
13. The diameter of women's hair is half that of men's.
14. A human hair can support a weight of 100g.
15. The nail on the middle finger grows faster than the others.
16. There is as much hair on a square centimeter of a human body as on a square centimeter of a chimpanzee's body.
17. Blondes have more hair.
18. Fingernails grow about 4 times faster than toenails.
19. The average lifespan of a human hair is 3-7 years.
20. You need to be at least half bald for it to become noticeable.
21. Human hair is virtually indestructible.
Internal organs
We do not remember the internal organs until they disturb us, but it is thanks to them that we can eat, breathe, walk and all that.
22. The largest internal organ is the small intestine.
23. The human heart creates enough pressure to send blood spurting seven and a half meters forward.
24. Stomach acid can dissolve razor blades.
25. The length of all blood vessels in the human body is about 96,000 km.
26. The stomach is completely renewed every 3-4 days.
27. The surface area of human lungs is equal to the area of a tennis court.
28. A woman's heart beats faster than a man's.
29. Scientists say that the liver has more than 500 functions.
30. The aorta has a diameter almost equal to that of a garden hose.
31. The left lung is smaller than the right - so that there is room for the heart.
32. You can remove most of the internal organs and live on.
33. The adrenal glands change size throughout human life.
Body work
We don't really like to talk about it. Here are some facts about not the most pleasant things that concern our body.
34. The speed of a sneeze is 160 km/h.
35. The speed of coughing can even reach 900 km/h.
36. Women blink twice as often as men.
37. A full bladder is about the size of a softball.
38. Approximately 75% of human life products consist of water.
39. There are approximately 500,000 sweat glands on the legs, they can produce up to a liter of sweat per day!
40. In a lifetime, a person produces so much saliva that it can fill a couple of pools.
41. On average, a person releases gases 14 times a day.
42. Earwax is essential for ear health.
Sex and procreation
Sex is a largely taboo, but very important part of human life and relationships. Procreation is no less important. You may not have known a few things about them.
43. Every single day in the world there are 120 million sexual acts.
44. The largest human cell is the egg, and the smallest is the sperm.
45. During the first trimester of pregnancy, women most often dream of frogs, worms and plants.
46. Teeth begin to grow six months before birth.
47. Almost all babies are born with blue eyes.
48. Children are strong as bulls.
49. One in 2,000 babies is born with a tooth.
50. The fetus acquires fingerprints at the age of three months.
51. Each person for half an hour of his life was a single cell.
52. For most men, an erection occurs every hour or every hour and a half during sleep: after all, at night the brain is much more active.
Feelings
We perceive the world through the senses. Here are some interesting facts about them.
53. After a hearty meal, we hear worse.
54. Only one third of all people have one hundred percent vision.
55. If saliva cannot dissolve something, you will not taste it.
56. From birth, women have a better sense of smell than men (this confirms the idea of a more developed intuition in women - vg_saveliev).
57. The nose remembers 50,000 different scents.
58. Pupils dilate even due to small interference.
59. All people have their own unique smell.
Aging and death
We age throughout our lives - that's the way it works.
60. The mass of ash of a cremated person can reach 4 kg.
61. By the age of sixty, most people have lost about half of their taste buds.
62. The eyes are the same size throughout life, but the nose and ears grow throughout life.
63. At 60, 60% of men and 40% of women will snore.
64. The head of a child is a quarter of his height, and by the age of 25, the length of the head is only an eighth of the entire length of the body.
Diseases and injuries
We all get sick and injured. And that's pretty interesting too!
65. Most heart attacks occur on Mondays.
66. People can go much longer without food than without sleep.
67. When you burn in the sun, it damages the blood vessels.
68. 90% of diseases are caused by stress.
69. The human head remains conscious for 15-20 seconds after it has been cut off.
Muscles and bones
Muscles and bones are the frame of our body, thanks to them we move and even just lie down.
70. You use 17 muscles to smile and 43 to frown. If you don't want to strain your face, smile. Anyone who walks around with a sour face often and for a long time knows how hard it is.
71. Children are born with 300 bones, while adults have only 206.
72. In the morning we are a centimeter higher than in the evening.
73. The strongest muscle in the human body is the tongue.
74. The heaviest bone in the human body is the jaw bone.
75. To take a step, you use 200 muscles.
76. Tooth is the only organ incapable of regeneration.
77. Muscles decrease twice as slowly as they pump up.
78. Some bones are stronger than steel.
79. The feet contain a quarter of all the bones of the human body.
At the cellular level
There are some things you can't see with the naked eye.
80. There are 16,000 bacteria per square centimeter of the body.
81. Every 27 days you literally change your skin.
82. Every minute 3,000,000 cells die in the human body.
83. People lose about 600,000 skin particles every hour.
84. Every day, the adult human body produces 300 billion new cells.
85. All tongue prints are unique.
86. There is enough iron in the body to make a 6-centimeter nail out of it.
87. The most common blood type in the world is the first.
88. The lips are red because there are many capillaries under the skin.
Some more interesting facts
89. The colder the room where you sleep, the more likely you are to have a nightmare.
90. Tears and mucus contain the enzyme lysozyme, which destroys the cell walls of many bacteria.
91. In half an hour the body releases as much energy as it takes to boil one and a half liters of water.
92. Ears produce more earwax when you are afraid.
93. You can't tickle yourself.
94. The distance between your outstretched arms is your height.
95. Man is the only animal that cries because of emotions.
96. Righties live an average of nine years longer than lefties.
97. Women burn fat more slowly than men - about 50 calories a day.
98. The fossa between the nose and the lip is called the nasal groove.
99. A feeling of fatigue appears at loads of 35-65% of the absolute capacity.
100. The activity of the cardiovascular system is maximum by 18 o'clock, minimum at 3-4 o'clock.
101. The biological qualities of offspring increase from the 1st to the 4th child, then fall.
102. The composition of blood plasma is reminiscent of the composition of the water of prehistoric foreshores, in which life originated.
103. For one contraction, the heart pumps 200 ml of blood.
104. Complete circulation of the blood of an adult is completed in 20-28 seconds, in a child - in 15 seconds, in a teenager - in 18 seconds.
105. The strongest muscle in the human body is the tongue, not the heart. The heart is the most enduring muscle.
106. The total length of hair on the head, grown on average by a person during his life, is 725 kilometers.
107. A person who smokes a pack of cigarettes a day drinks half a cup of tar a year.
108. Tooth enamel can be compared to quartz. It is known that even the tip of a saber blunts when it hits the enamel.
Incredible Facts
The main means by which we interact with the world around us are the sense organs. We can hear, see and smell with them. Their importance cannot be overestimated.
Interesting Facts:
- Ears are also organs balance.
- A favorable background for a person ranges from 45-50 decibels (corresponding to a quiet conversation). According to acousticologists, everything above this background is already called noise load and contributes to weakening of the immune system person.
- At 30% children are found to have hearing problems, which can lead to school failure. That is why doctors insist on undergoing a hearing test in infants.
- Loud sounds that affect a person for a long time can lose hearing.
- Men have worse hearing than women.
Known facts about human vision
Near two-thirds The human race has poor eyesight. The quality of human vision deteriorates as we age.
Interesting Facts:
- "Carrots are good for the eyes" - we hear from childhood. Indeed, vitamin A, which is saturated with carrots, is good for health. However no direct connection between the carrot and the eyes.
- Most of the children born have gray-blue eyes. Eyes acquire their true color only after two years.
- Green is the rarest eye color in humans. Only 2% people on Earth have green eyes.
- All people with blue eyes can be considered relatives. A mutation of blue eyes arose about 6,000-10,000 years ago, approximately in the area where the modern the city of Odessa.
- In 1% of people, the irises of the left and right eyes differ in color.
- Theoretically, the human eye can distinguish 10 million colors and about 500 shades of gray.
- The drawing of the iris of the eye is individual for each person.
The human senses are the five functions of the body that allow us to perceive the world around us and respond in the most appropriate way. The eyes are responsible for sight, the ears are responsible for hearing, the nose is responsible for smell, the tongue is responsible for taste, and the skin is responsible for touch. Thanks to them, we receive information about the world around us, which is then analyzed and interpreted by the brain. Usually our reaction is to prolong pleasant sensations or to stop unpleasant ones.
Interesting facts about the human senses.
People receive information about the surrounding space with the help of six senses: ears, eyes, skin, tongue, nose and vestibular apparatus. The data received by each of them enters the nervous system.
More than half of the inhabitants of the Earth have diseases associated with the organs of vision.
It is believed that overeating adversely affects hearing.
Humans only taste solid food after it has interacted with saliva.
Women distinguish shades of odors better than men. In addition, the beautiful half of humanity hears much better than their defenders.
Approximately 2% of the world's population has no sense of smell.
The human memory is capable of storing memories of about 50,000 scents.
Loud noise provokes pupil dilation.
Each person has his own, unique smell - focusing on it, babies accurately determine their mother, and adults can find a suitable partner for them.
The sense of smell of dogs is almost a million times stronger than that of humans.
The ears are not only an organ of hearing, but also an important element of the vestibular system - simply, they help a person maintain balance.
A noise level of 45-50 decibels is considered favorable for human hearing - calm conversations are conducted at such a volume. Any sounds above this limit negatively affect the human body, including the immune system.
The conventional wisdom about the benefits of carrots for vision is not entirely true - orange fruits do contain a lot of vitamin A, beneficial for the eyes, but eating carrots and excellent vision are not directly interconnected.
Most children are born with gray-blue eyes, which only after 2 years acquire their true color.
The rarest eye color in humans is green (only 2% of the inhabitants of the Earth are green-eyed).
All blue-eyed people descended from the same ancestor, in whose body a mutated gene arose about 6,000 years ago.
Approximately 1% of people have a different color of the iris in each eye.
Human eyes can distinguish up to 10 million color variations.
Perfumes are considered ideal for a person, the smell of which he does not feel.
The pattern of the iris of each person is no less unique than fingerprints or the shape of the auricles.
The human brain takes time to process signals from the senses, so everything that people feel at a certain moment actually refers to the previous moment of their life. The perception delay is about 100 milliseconds, but the brain somehow manages to compensate for it - the essence of this mechanism is not yet clear to scientists.
Signals from different sense organs enter the brain at different speeds, so that later the brain creates a single picture from them.
Scary events are sometimes perceived by people as a movie in slow motion, although in fact, frightening phenomena are simply recorded in more detail by the brain.
People who are blind from birth and become sighted only at a conscious age can perceive many things with distortion - since their brain does not know how to dispose of information unusual for it, former blind people see people moving away from them as decreasing in size figures.
If you wear glasses that turn space upside down for some time, then the brain adapts to this image. When a person takes off his glasses, the world will seem upside down for some time.
We all studied biology, including the anatomical structure of a person. But, unfortunately, the school course provides only "dry" data, describing the main functions and type of organs, but very little data is given about their interesting features. Agree, it is interesting to know how the digestive system works? And the heart? This is useful information that will not only eliminate gaps in knowledge, but will also help you better understand your own nature. So, here are some interesting facts about the work of human organs.
What have we not known all this time?
1. Facts about the digestive tract
The inner epidermis of the walls of the stomach is updated at intervals of a couple of weeks. This is due to the action of gastric juice, which dissolves the mucous membrane of our "culinary esthete".
The longest internal organ is the small intestine. Its length is measured at about four human heights!
The hydrochloric acid that the stomach contains is so strong that it can dissolve small metal objects. We do not recommend to apply in practice!
2. Interesting features of the heart and circulatory system
The pressure created by strong contractions of the human heart is enough to squirt blood up to 8 meters away. And no wonder! Try to pump the entire circulatory system of the body ...
The diameter of the aorta can be compared to the diameter of a garden hose, due to the need to enrich the heart with blood containing oxygen.
The total length of blood vessels is about 96 thousand kilometers. This is enough to encircle the Earth twice along the equator with a margin!
A person can live normally if the blood through the vascular system does not go discretely, but circulates constantly.
Women's heartbeat is more frequent than men's. This happens because of the smaller volume of the female heart, so he has to pump blood more intensively. Modern medicine does not take into account these features, but it would be worth it.
3. A little about the airways
The surface of a human lung is large enough to cover a tennis court. This is possible thanks to the thousands of bronchi and alveoli that are filled with microscopic capillaries.
The left lung is somewhat smaller than the right. This is necessary in order to fit the heart.
The air we exhale during a sneeze moves at a speed of 160 km/h.
4. Organs of the urinary system, biliary tract
The liver is the main "bee" in the large "hive" of the body. It performs about 500 functions! In particular, it produces bile, decomposes red blood cells, synthesizes plasma proteins, and performs a detox program after a stormy holiday.
The adrenal glands change their size depending on the age category and the state of the body. So, for example, in the third trimester of pregnancy, they approach the dimensions of the kidneys, and in old age they are practically invisible.
At the end of the first trimester of pregnancy, the liver of the unborn baby is half the total weight!
It is the liver that regulates the temperature in the body at the level of 37`C.
The total length of the capillaries in the kidney is about 25 kilometers. It has a million filter elements.
The bladder of a healthy person can hold up to two glasses of urine for up to 5 hours.
5. external organs
The corneas of the eyes are the only part of the human body that is not supplied with oxygen through the blood. She receives it through tears.
Earwax, which is designed to lubricate and clean the ear canals, also performs a bactericidal function. It can treat wounds and herpes.
Over a lifetime, about 3,000 cubic meters of saliva is secreted in our body.
6. brain activity
The approximate amount of our memory is from 3 to 1000 terabytes.
The brain takes 20% of all oxygen "supplied" to the body, given that its mass is only 2% of the total body weight.
4/5 of our brain is water.
The number of nerve cells, contrary to the ideas of scientists, is growing throughout our lives.
The brain does not feel pain when struck. It is caused by injury to the muscle tissue that surrounds the skull.
The higher the intelligence, the more dreams a person sees.
7. Features of the musculoskeletal structure
The skeleton of a newborn consists of 300 bones, and the skeleton of an adult - of 206.
Of the total number of bones, a quarter of them are in the feet. And about half of all bones are in the feet and hands.
A frown uses 43 facial muscles, but a smile uses only 17! Smile, gentlemen!
The strongest bone in the human structure is the jaw, and the strongest muscle is the tongue.
5. General information
The human body does not need most of its organs! He lives quietly without a spleen, stomach, 80% of the intestines, without 75% of the liver and in the absence of one kidney, lung and any organ of the genitourinary system.
Approximately one person in ten thousand has a mirror image of the internal organs: the liver and appendix are on the left, and the heart and stomach are on the right.
The human body produces as much heat in half an hour as is necessary to boil half a liter of water.
Our body is a unique "machine" that has a lot of interesting features! They can be listed endlessly! This is an undoubted subject for the pride of every Homo sapiens. And know that you are unique!
Science has been trying to unravel the secrets of the human body for thousands of years. The information collected is so rich that it is simply unrealistic to fit everything into a regular anatomy textbook. That is why there is a huge amount of interesting data about the work of our body, which we are not even aware of.
Facts about how the brain works
The brain of the average person is capable of processing written language at the speed of a thousand words per minute.For adequate work, our brain needs as much energy as an ordinary incandescent light bulb.
Intelligence is strongly associated with dreams: the more intelligent a person is, the more often he sees dreams.
The neural connections in the human brain are structurally similar to the structure of the universe. There is even a theory that our brain is modeled "in the image and likeness" of the universe.
Pain receptors are located throughout the body, but not in the brain, he himself is not able to feel pain, it only processes the signals of the receptors and sends impulses.
About 80% of the brain is fluid
The feeling of falling in love causes the brain to produce a cocktail of hormones and neurotransmitters that resembles amphetamines. This leads to increased heart rate, loss of appetite and sleep, and a feeling of euphoria. If the human brain were computerized, then such a computer would be capable of performing 38,000 trillion operations per second. The most powerful supercomputer is capable of only thousandths of such indicators.
The brain perceives loneliness as physical pain. Just as we instinctively avoid pain, we also avoid loneliness.
Crying relieves the brain of stress by allowing the fight-or-flight response to calm down. Tears relieve feelings of anger, sadness, and fear, so crying is really helpful. Facts about the senses
Human fingers are so sensitive that even if they were the size of the Earth, we could feel the difference between a car and a house. There is a certain state in which the sense organs are "mixed". Synesthesia causes stimulation of a particular sense organ to trigger a response from another sensory system. For example, synestats can not only hear words, but also taste them.
In addition to the historically familiar five senses (sight, touch, smell, hearing and taste), people have more than 10 other well-known and necessary senses for us, such as balance, temperature, pain, thirst, hunger, and so on. For good hearing, a constant production of earwax is necessary. Ear wax is produced in large quantities even when we are afraid.
vision facts
The human eye is so sensitive that if the Earth were flat, we could see a burning candle at night at a distance of 60 kilometers.
The human body is bioluminescent and glows in the dark. The light emitted by the body is too weak to be visible to the human eye. Our eyes are able to perceive ultraviolet light. This ability is blocked by the lens. People who removed the lens or changed it after the operation were able to perceive ultraviolet light.
Some people, mostly women, are able to perceive more colors than everyone else. Most of us have three types of color receptors, but there are those who have four or even five types, which allows them to see many more shades. To focus, our eye muscles tense about a hundred thousand times a day. For such a warm-up of the muscles of the legs, you need to walk about a hundred kilometers on foot.
Facts about the circulatory system
When we blush, the inner lining of the stomach also turns red.
We need to breathe so often not because we need to inhale oxygen, but because we need to get rid of carbon dioxide accumulated in the blood. If the body could get rid of CO in another way, one breath per minute would be enough for us.
For every additional kilogram of weight, be it muscle or fat, the body creates about 20 kilometers of new blood vessels.
In one day, blood passes through the vessels a distance equal to 20 thousand kilometers. This is the distance from Moscow to Vladivostok and back.
Every person on the planet has some gold. True, it is in the composition of our blood and it is only 0.2 milligrams. To fuse a coin of 8 grams, it is necessary to bleed 40 thousand people. But there is enough iron in our blood to fuse half an iron coin, that is, weighing 4 grams.
Facts about the cellular structure
In the deepening of the navel, a huge number of bacteria live, which create a whole ecosystem there, in diversity and richness not inferior to the rainforest. An average adult human is made up of 7 octillion atoms, that's 7 x 10
. For example, in our galaxy it was possible to count about 300 billion stars 3 × 10
.
We are made up of the same atoms that were formed during the Big Bang, that is, almost 14 billion years ago. Human DNA matches the DNA of a banana by almost half.
The egg is the largest cell in the human body, while the sperm is the smallest cell. One sperm carries 37.5 megabytes of information (male DNA) necessary to conceive an embryo. It turns out that as a result of sexual intercourse, a man leaves about one and a half thousand terabytes of genetic information.
The body produces 25 million new cells per second.
About 90% of our body consists of cells that do not belong to human nature, these are mainly fungal cells and bacteria. Skeleton and Muscular Facts
Our muscles are very strong. Usually their strength and power is limited for the sake of self-defense. This restriction can be removed during the adrenaline rush, when people are able to lift large stones and cars, run huge distances. If the self-protection mechanism did not work, such a force would lead to damage to the tendons and the muscles themselves. Frowning is much harder than smiling. A smile strains 17 facial muscles, and a frown - 43.
Newborn babies have a third more bones than adults. A baby has 300 bones, while adults have 94 less. Of the 206 bones in our skeleton, 54 are located in the feet.
Human bone is as strong as granite. A piece of bone the size of a matchbox can support nine tons. Man is the best long-distance runner in the entire animal kingdom. No quadruped is able to run as long as a man.
The hardest and strongest bone in the human body is the lower jaw.
The strongest and densest muscle is the tongue. You need to use more than two hundred muscles to take one step in a straight line on a flat road.
hair facts
Humans have as much hair as chimpanzees, we just don't need most of it, so it's become thin and light. Men's hair is almost twice as thick as women's. Blacks have thicker hair than Caucasians. Blondes have more hair than brunettes, but they are much thinner.
A person loses about a hundred hairs a day. At the same time, the average duration of growth and "life" of one hair is 7 years. Hair decomposes the slowest. They are practically indestructible.
