These are some of the most interesting facts about our bodies. The adult human skull is capable of replacing itself approximately every ten-years. There are four blood types and 206 bones. There are two kidneys. The human body is actually one of the most complex on the planet.
The adult human skeleton changes every ten year
Throughout adulthood, the human skeleton undergoes continuous remodeling and rebuilding. Bone remodelling and repair are made possible by bone cells. A human's bone tissue is nearly replaced every day for the rest of his or her life. Osteoblasts are bones cells. They break down bone tissue and make new bones. This process is called "bone remodeling" and is measured by a bone density measurement.
It has two lungs
The human body has two lungs, or lobes, that are located in the chest cavity. These organs are responsible to exchange air and remove carbon dioxide. Each lung is covered by a membrane, called a "pleura", which is connected to both the heart (and trachea) by the mainbronchus. Pleural membranes are thin and flexible, and act as an air filter. They also allow air into the lungs via the nose or mouth.
It has two earlobes
Despite sharing many similarities, human ears differ in their size, shape, color, and appearance. The earlobe is a complex system of structures that allow us to hear and walk. The average ear size for men is larger than that of women. The average ear length measures 2.5 inches. The earlobe measures 0.74 in long and 0.77 in wide. According to studies, the size of the ears grows with age.
FAQ
How does your brain control the functions within your body?
To ensure that other organs and muscle functions work together, the brain sends messages. Your body's functions are controlled by your brain. It tells the stomach to digest food, and the lungs to breath air. It also tells your legs and arms to move.
Your brain is made up billions of nerve cell networks connected in groups known as neurons. Neurons communicate by sending electrical signals, called action potentials, on axons. Each neuron has a cell membrane surrounding its nucleus. There are channels within the membrane that allow ions such a sodium or potassium to enter and exit the cell. Ion movement creates the electric charge that causes the neuron to fire.
Neurotransmitters are chemicals released when a neuron fires. 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 synaptic pathway that connects both neurons. The transmitter binds to the receptors on the postsynaptic neural cell, which triggers the firing of that neuron.
For communication within the nervous systems, neurotransmitters are essential. They coordinate activity between the different parts of your brain.
Is there a more mysterious place than the Earth itself?
Antarctica is considered the most mysterious area on Earth.
We find this place so fascinating. It is unlike any other place on Earth.
It is isolated, remote, and very hard to visit. 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 now see how this amazing destination came to be so well-known for its mystery.
Antarctica: The South Pole
Antarctica's name is a mystery. Some believe it refers to "land of ice". Others believe it comes out of Greek mythology.
Antarktis, the Greek name for the island on which Zeus' twin brothers were conceived, was used in ancient Greece. One of the twins was said to have been born in winter. The term antarctic is derived from this.
Others believe that the name is a combination of the Greek words anti and tropos which mean against and turn. This would translate to land that is turned away from the sun.
Whatever the reason Antarctica has held a special fascination for people, it is undeniable.
It is also the lowest, windiest continent, driest, and highest. It is too cold to support trees, plants, and animals.
Yet, the frozen desert is alive with life.
Here are about 90% of all the living creatures on Earth. About 50% of the world's plant and animal species can be found here.
And what makes Antarctica such a unique environment? Here, water freezes into ice instead of evaporating into the air.
This results in large masses of ice floating above the ground.
These floating glaciers cover over 80%. They continue to grow in size each year.
The Antarctic ice has grown 60 feet so far since 1960.
If the melting continues, sea level could rise up to 200ft. This could lead to massive flooding across the globe.
But not everyone thinks this is bad news. Some scientists suggest that global warming could actually be good for us. According to scientists, global warming could be good for us because the melting of the ice sheets will accelerate, which can lead to floods that release toxic chemicals into our soil and bodies.
Others cautioned that this theory sounds too science fiction.
These are five interesting facts about livers
The liver is responsible to detoxify toxins and store vitamins and minerals. It regulates blood pressure and maintains a stable body temperature.
Are you familiar with the expressions, "I feel sluggish today", or "my head feels heavy"? These symptoms could be signs of liver problems.
Itching, dark urine and yellowing skin are all common symptoms. These are not all the warning signs. If you experience any of them, make an appointment with your doctor immediately.
The liver plays a crucial role in our lives. It plays a role in detoxification, digestion, metabolism, immunity, and reproduction.
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The average adult human liver is approximately 1,400g.
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The liver of a baby is roughly half the size that of an adult at birth. By age three, it is about four times larger than that of an infant.
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The liver is located on the left side, just below your rib cage.
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The liver has 16 main lobes, with many smaller lobules within the lobes.
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The liver is home to approximately 10 million red blood cell units.
Have you ever wondered how much trash is produced worldwide each day?
According to the United Nations there are more than 25 billion tons of garbage produced each year.
The majority of this garbage ends up in incinerators or landfills. But what happens when the dumpsters become full? It goes to the United States, where most of it is exported. It is then dumped in other countries, where it pollutes their ecosystems.But now, thanks to the work of one man, we know exactly where all this trash goes. Mike Sexton is his nickname. He runs a company called Waste Watchers.He spends his days watching the movements of trucks transporting trash across North America. Then he reports back to us about what happens next.
Sexton states that he finds his work very fulfilling. CNN asked Sexton if he thought it was a lot of fun. "We'll be following these big rigs through town. "Sexton began to follow truck drivers around 20 years ago.
He stated that he fell in love with the product.
Sexton's favorite story was about a driver who stopped at an abandoned gas station in Los Angeles. Sexton described, "The guy was looking somewhere to put his load." "He drove down the road to see this building. So he backed up and went inside. "There were two huge roll-off containers there filled with stuff. The guy took everything out and started filling up the truck again. He then looked around and decided to load everything. There were tires, rags. furniture, mattresses. boxes, bottles, cans. "It was a complete mess. But it had been cleaned out before he came along. There wasn't any trash."
Why did this happen? The answer is that this location was once part of a recycling facility. People who knew about it would drive to this location to recycle their garbage. Sexton said that people would bring their household items to the building and then leave empty containers behind.
This could happen hundreds of time per week. The truck can be stopped running if it is so full of junk that it has to come back hundreds of times per week. The owner finally decides to stop using the truck.
However, trash is not the only problem on our planet.
Many of these tiny plastic pieces end up in landfills and incinerators. Others end up in rivers, oceans or the stomachss of fish.
Experts warn of a possible global food crisis if nothing is done. Experts warn that if we continue to go the same way, we won't make it. However, scientists and most people aren't worried.
Statistics
- "It is estimated that 75% of people have at least mild gum disease, with the most common symptoms being bleeding when brushing, bad breath, and dark and swollen gums," Dr. Ron Baise, a London-based dentist, tells Romper. (romper.com)
- In one 2014 study published in the Archives of Medical Science that sought to study the prevalence of these mites, research showed that 41% of the people had them hanging out in their eyelashes. (romper.com)
- Your mouth makes a lot of saliva every day It might seem like way too much, but your salivary glands typically produce anywhere from 0.5 and 1.5 liters a day, according to a 2009 study published in the Journal of Medicine and Life. (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)
- It might not sound like something that's truly plausible — and it is quite rare — but according to a 2015 study published in the Asian Cardiovascular & Thoracic Annals, it's possible to hurt yourself and even break a rib just by sneezing. (romper.com)
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American history's secret societies and clubs
Many reasons make American History's secret societies and clubs fascinating. They are mysterious because of this. Another reason is because of their effect on our society.
American history has seen secret societies and clubs used to promote ideas that were otherwise taboo. These ideas include anti-Semitism and racism. These groups also spread ideologies like communism and socialists.
The Ku Klux Klan, the most famous American organization, is also the most important. This group was established in 1865, after the Civil War had ended. It was created to protect white men against African Americans.
Other organizations established during this period were the Knights Templars and Freemasons. All of these groups shared similar beliefs and goals.
Another interesting aspect of secret societies is that they often had memberships restricted to males only. These secret societies also included women. These women included Emma Goldman. Margaret Sanger and Susan B Anthony.
In addition to the groups mentioned above, other secret societies did not share the same ideals. The Order of Skull & Bones for instance was founded in 1832. Their goal was to create an elite group within the United States.