Human Body Facts
Human body facts : What do we know about our body? This apparently simple question baffles many researchers and even doctors. Here are some interesting facts that may lead us to think that our body is arranged in a much more complex way than we thought.
Human body facts : Let’s start with the brain, our most complex organ yet the most unknown.
The brain does not “feel” the pain. It is reported to it by thousands of sensory receptors of pain, and the brain itself does not have cells to feel the pain.
The number of dreams depends on the IQ (intelligence quotient).
80% of our brain is made of water. Its average weight is 1.3 kg at 18 years old.
A cell in our brain can hold 5 times more information than any encyclopedia. In other words, the brain can contain from 3 to 1000 terabytes. In comparison, the National Archives of the United Kingdom describing nine centuries of history is only 70 terabytes.
The brain is more active at night.
The brain needs as much energy as a 10-watt light bulb.
The brain consumes more oxygen than any other organ, using 20% of the oxygen circulating in the blood.
The brain never sleeps.
Nerve cells repair themselves, and brain neurons are formed throughout life.
Laughter involves at least five areas of the brain.
Other facts about the human body:
Human body facts : Gastric acid from the stomach can dissolve even razor blades.
Human hair live from 3 to 7 years old. Women’s hair is twice as thin as men’s hair. We lose 60 to 100 hairs every day.
Our heart creates enough pressure to squirt the blood at 7.5 m.
Every 3 to 4 days our stomach is completely redone. The skin does the same in 27 days: we lose 600,000 skin particles every hour.
During our sleep, we enlarge by 8 mm and we shrink again at the end of the day.
The total area of our lungs is the size of a tennis court. The left lung is smaller than the right.
Each step makes 200 muscles work.
In 30 minutes our body generates as much energy as it needs to boil 1.5 L of water.
We use 17 muscles to smile and 43 to express our discontent.
3 million cells are killed every minute in our body.
Our body, star dust
Human body facts : Our body has the largest molecule of nature – the first chromosome. It consists of 10 billion atoms, and can retain a large number of genes.
The body of an adult man is made of 7 quadrilliards (7 × 1027) of atoms. In spite of this, the atoms constituting our body are mainly made of emptiness. Without this, the body could be compressed into a volume equal to a cube with sides of 1/500 cm.
Every atom in our body is billions of years old. Most of our body and the most abundant element in the universe, hydrogen, was created during the Big Bang 13.7 billion years ago. Other atomic elements like carbon and oxygen were created by stars 12.7 billion years ago. It was projected into space during the explosion of stars. Scientists consider that the human body is made of star dust.