Some of the most fascinating facts about human bodies are surprising to learn. An adult human's skull replaces itself about every tenth of a century. There are four blood types and 206 bones. Two kidneys also exist. In fact, the human body is one of the most complicated bodies on earth.
Every ten years, a adult's skeleton gets replaced.
The human skeleton is constantly in constant remodeling and rebuilding throughout adulthood. Bone remodelling and repair are made possible by bone cells. Nearly 100% of the bone tissue within a human body is replaced during a person's lifetime. Osteoblasts are bone cells that break down bones to make new ones. This process, known as bone remodeling is measured using a bone density measurement.
It has two lungs
The chest cavity houses two lungs. These organs exchange oxygen and remove carbon dioxide. The pleura is a membrane that surrounds each lung. It is connected to the heart via the main bronchus. Pleural membranes are thin and flexible, and act as an air filter. They also allow air in the lungs to flow through the nose, mouth, and nose.
It has 2 earlobes
Despite the similarities between them, human ears can be quite different in terms of their size, shape and color. The complex system of structures within the earlobe enables us to hear and move. Women's ears tend to be larger than those of men. The average ear length is 2.5 inches, and the ear lobe is 0.74 inches long and 0.77 inches wide. Studies show that the size of the earlobes increases with age.
FAQ
What is the most mysterious location on Earth?
Antarctica is the world's most mysterious place on Earth.
Why is this place so amazing? Because it is unlike anything else on Earth.
It is very remote and isolated. This site has more to it than meets your eye.
Some of the most bizarre wildlife species can also be found in this natural wonder.
Let's find out how this mysterious destination became so famous.
Antarctica: The South Pole
Antarctica is named for no one. Some say it means "land on ice." Others believe it comes out of Greek mythology.
Antarktis in ancient Greece was the name given the island where Zeus' twin brother brothers were born. According to legend, one twin was born in winter. This is why the word "antarctic" was chosen.
Others believe that the name comes from the Greek words anti meaning against and tropos meaning to turn. This would mean land turned away from the sun.
Whatever the reason Antarctica holds a special fascination, people have always loved it.
It is the driest, windiest of all continents. Because it is so cold, there aren't any trees, plants or animals.
This frozen wasteland is still alive.
About 90 percent of all living things on Earth live here. There are about 50% of the world's animal, plant and plant species.
What is it that makes Antarctica so unique? Here, water freezes into ice instead of evaporating into the air.
This causes large amounts of ice to float above ground.
These glaciers cover more than 80% of the continent. They're getting bigger every year.
So far, the Antarctic ice sheet has grown 60 feet since 1960.
If the melting continues, sea level could rise up to 200ft. It could result in massive flooding all over the world.
However, not all scientists believe this to be bad news. Some scientists believe that global warming can be beneficial. They say that as temperatures rise, the ice sheets might melt faster, causing floods that flush out tons of toxic chemicals from our soil and bodies.
But others warn that this theory sounds like a plot from a science fiction movie.
Which is the most secretive city in the world?
The answer may shock you. You might be uncomfortable with the truth of it, as it may challenge your perception of reality. But there is a reason why this place exists. And it is not what you would expect.
It was also called the City of God in ancient Greek. According to the Bible, it was called the City of Destruction.
It's also known as Kashi (Kashmir) in India. It is called Novgorod (Russia).
Here in America, however, it is called The Village That Disappeared.
One small community in western New York State with 1,200 residents vanished without a trace. No bodies, cars, houses, nothing was left behind except a road sign pointing to its former location.
This little community vanished and no trace remains to indicate where or when it disappeared. Some claim the earth swallowed it. Others believe it was destroyed by a meteorite. Still, others say aliens took it away.
Whatever happened, the residents of this once-thriving community are convinced that their town isn't gone forever. They just moved to another city.
A website is available to track the disappearance and recovery of Zugspitz, which was lost in the Great Depression.
So where is this town? It's in Switzerland.
You can find Zugspitze at the border of Austria and Germany. A huge lake, Lake Zugspitze, is located just beyond the summit.
It's always fascinated me how so many towns disappear, yet others remain. Why does some vanish while others remain? I set out to find out.
I was curious about the disappearing towns. What is the secret to a town's disappearance? How can one place vanish from existence?
It turned out that there are many theories about disappearing towns. One theory is that a city disappears after all buildings have been demolished. Another theory suggests that the town simply moves somewhere else. The third theory is that the town was never actually there.
The fact is that hundreds of towns all over the world have been swept away by the ground, despite theories to the contrary. This video examines the past and present status of these areas.
How does your brain control the functions within your body?
To ensure that they work together, messages are sent by the brain to other organs. The brain controls everything that happens in your body. It tells your stomach to digest food and your lungs to breathe air; it tells your arms and legs to move.
Your brain is made of billions, or neurons, of nerve cells. Neurons communicate with each other by sending electrical signals called action potentials on axons. Each neuron has a cell membrane surrounding its nucleus. The membrane contains channels that allow ions like sodium and potassium to enter the cell and leave it. Ion movement creates the electric charge that causes the neuron to fire.
When a neuron fires, chemicals called neurotransmitters are released into the space between the neuron and the next neuron. Neurotransmitters bind with receptors on the second nerve cell, opening ion channel channels to allow ions in and out. In turn, the second neuron also fires.
Neurotransmitter release occurs when the presynaptic neuron receives an impulse from another neuron. The impulse travels along the synapse connecting the two neurons. The transmitter binds to receptors on the postsynaptic neuron, triggering the firing of the postsynaptic neuron.
For communication within the nervous systems, neurotransmitters are essential. They also help coordinate activity between different parts of the brain.
What are some dark secrets in Hollywood?
Hollywood is full secret societies. Many secret societies are cult-like and follow rigid rules. Others are just clubs for people with common interests.
However, there are many other criminal organizations that hold much of the industry's power. These include companies like the MPAA ("Motion Picture Association of America"), which determines film ratings. The RIAA ("Recording Industry Association of America") sets music licensing fees.
Numerous unions or guilds also represent producers, writers, actors, etc. Most major movie studios and television networks are owned by large corporations which own these various organizations.
It doesn't matter how secretive a group might seem, someone somewhere knows what they are doing. We shouldn't fear these people.
Instead, we should embrace them. Because they provide us with information that helps us make better decisions.
These experts tell us which movies are most likely to succeed, which songs will be in demand, and what books will sell the best.
In short, they help us decide what we'll buy, watch, read, and listen to.
We can trust them and can disregard their advice if it is not in line with our preferences.
Because we have chosen to ignore their power, they are even more powerful. They become the ultimate arbiters of taste.
If you don't like their words, you can choose to ignore them.
Let's take a closer look at some of the less-known, yet still very real Hollywood secret clubs.
You'll see why they are so important.
Statistics
- In fact, nearly 24% of U.S. women are affected with one or more pelvic floor disorders, according to research funded by the National Institutes of Health. (romper.com)
- The average human adult male heart rate is between 70 and 72 beats per minute, while the average for adult women is between 78 and 82 beats, which is significantly faster, according to 2014 published in the Journal of Clinical and Diagnostic Research. (romper.com)
- A 2012 paper published in the Proceedings of the National Academy of Sciences reported that people blink about 15 to 20 times each minute, meaning, if you do the math, you spend about 10% of the time that you're awake blinking. (romper.com)
- In fact, according to the American Academy of Ophthalmology, you make 15 to 30 gallons of tears each year, which is insane when you think about it. (romper.com)
- According to a 2018 study published in Free Radical Biology & Medicine, this is because blood pressure is regulated by our innate circadian rhythm and internal clock. (romper.com)
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How To
What's the scariest film you have ever seen?
There are likely to be 10 different answers to the question of which scary movies you watch.
Some people love horror films. Others enjoy sci-fi flicks. And then some prefer comedies.
No matter your preferences, everyone has seen some truly frightening movies.
These are ten great scary movies, ranging from the classic Halloween to the modern Paranormal Activity.
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"Cabin fever" - "Cabin fever" is one of the most terrifying zombie movies ever made. It depicts a virus causing humans to become zombies.
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"Thir13en Ghosts", an adaptation of the true story by Jack the Ripper, features a group possessed and controlled by ghosts by teenagers.
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"Pulse", an action thriller, is about a man that was robbed and left in his home during a violent crime spree. He must fight off attackers using only the items found inside his home.
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"The Descent", a found footage horror movie, tells the story of a group that ventures underground to seek adventure. Things quickly go horribly wrong once they reach their destination.
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"Get Out", a 2017 horror movie by Jordan Peele. "Get Out" tells the story of a young photographer from Africa who visits his white girlfriend's family during the holidays. He discovers dark secrets when he arrives.
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"Paranormal Activity" (2007) - "Paranormal Activity" was one of the very first found footage movies. The movie featured a new spin on ghost stories, starring Katie Featherston.
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"Audition" - In Japan, "audition" means to stand before an audience and be judged. That's exactly what happens in this film when high school student Kiyoko waits to hear if she will make it big time as a pop star.
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James Wan started the "Saw” Series after making horror movies with low budget budgets for years. He was getting tired of trying new ways to shock people. He decided to break from horror films and create Jigsaw.
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"Tales From the Crypt", "Tales From the Crypt", "Tales From the Crypt," - "Tales From the Crypt", becomes more frightening with each passing year. Hollywood has made numerous sequels featuring the crypt keeper terrorizing various US cities over the years.
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"Carrie," 1976. "Carrie", 1976. Telekinesis was introduced to viewers by Carrie. Carrie White can manipulate objects simply by thinking about them.