10 Things You Don't Know about Yourself

Throughout our lives, our bodies contain countless secrets that we don't even know about. In this article, we will list 10 secrets that you may not know about yourself.

10. Your stomach secretes corrosive acids

There's a dangerous liquid in your gut, but there's no way any airport security checkpoint can confiscate it. Your stomach secretes hydrochloric acid, a corrosive compound used in industry to treat metals. It cleans steel, but the lining of the stomach keeps the toxic hydrochloric acid safely inside the digestive system, helping us digest our food.

9. Your body posture can jog your memory

Husbands, can't remember when your wedding anniversary with your wife is? Then get down on your knees and try it. Memories are concrete interpretations of our feelings. A smell or a sound can evoke a distant moment from your childhood. There's a connection, but it's uncanny (the sound of a bicycle bell reminds you of the route you used to ride). A recent study helps explain this mysterious connection. A January 2007 article in the journal Cognition found that when you hold the same position as you did in the past, you recall the event faster and better.

8. Bones break down to balance calcium levels in the body

In addition to supporting our organs and muscles, bones help us regulate the amount of calcium in our bodies. Bones contain phosphorus and calcium, and calcium is essential for muscles and nerves. If there is less calcium in the body, a specific hormone causes the bones to break down, releasing some calcium to ensure the right concentration of calcium in the body.

7. Food for the mind is not enough to eat

Although the brain makes up only 2% of our total body weight, it uses 20% of our oxygen and heat. In order for our brain to have a good supply of resources, the three main cerebral arteries must always have a sufficient amount of oxygen. Obstructed or damaged in the three main brain arteries can starve brain cells without the energy they need to work, damaging the areas where these cells work. This is a stroke.

6. There are thousands of eggs in your ovaries that your ovaries have never used

When a woman is in her 40s, 90s, or early 50s, the menstrual cycle that controls her hormone levels and provides her with eggs for fertilization stops. Her ovaries will produce less and less estrogen, which will cause her physical and psychological changes, and the immature follicles will not be able to produce eggs as regularly as before. On average, an adolescent girl has 34,000 incomplete follicles in her body, of which only 350 will mature into eggs later in life (about one a month). An unused follicle will slowly degrade. If there is no recent pregnancy, the brain can stop interfering with ovulation.

5. Puberty can reshape the brain

It is well known that changes in the body, driven by hormones, are desperately needed for the body to grow and reproduce. But why are teenagers so emotionally unstable? Hormones like testosterone affect the development of nerve cells in the brain, and these hormonal changes cause changes in the structure of the brain, which can lead to changes in many behaviors. Some of the poor expression of their emotions, apathy, poor decision-making performance are affected by the prefrontal cortex maturity.

4. Hair cells secrete mucus

Most of the cells in our bodies are produced from hair-like organelles called cilia, which serve a variety of functions, from the digestive system to hearing. In the nose, for example, cilia help mucus flow from the nasal cavity to the throat. If it's cold, this flow slows down, the mucus returns, and you get a runny nose. Swelling or congealing of the mucous membranes in the nose can make the nose stuffy (blocked).

3. Bigger brains make less room in your mouth

Evolution is not so perfect. If we were perfect, we'd have wings instead of wisdom teeth. Sometimes people don't change traits that don't work because they don't do any harm. Once upon a time, wisdom teeth were mostly used as a meat-crushing third molar, not just left for the stomatologist to remove, as they are now. As our brains evolved, so did the structure of our jawbones, eventually leading to less and less space in our mouths, and some of our teeth becoming a bit redundant.

2. The whole world laughs when you laugh

Just as watching someone yawn makes you yawn, recent evidence suggests that laughter is a clue to imitation. Hearing someone laugh really stimulates the areas of the brain connected to facial movements. Imitation plays an important role in social interactions. Sneezing, laughing, crying, yawning are all ways to create a strong social connection with a group.

1. Your skin has four colors

All natural skin that has not been colored is milky white. Blood vessels near the epidermis give the milky color a reddish tinge. The yellow pigment causes your skin to turn a little yellow. Finally, ultraviolet light produces melanin, which makes the skin appear darker. These four hues mix in different proportions, but together they create the skin color of the Earth.