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Top 10 interesting facts about the human body

The human body contains miracles that sometimes we cannot believe can happen. Below are 10 interesting facts about the human body that you may not know.

1. Blood vessel

Fact: each pound of fat accumulated increases blood vessels by 7 miles.

Because of this, it is easy to understand that obesity and cardiovascular disease always go together. Most new blood vessels are tiny capillaries, but they are also small veins and arteries. This means that if you are "about 10 pounds overweight, your heart has to work to pump blood to these extra 70 miles of blood vessels. Fortunately, the opposite also happens. If you lose a pound fat, your body reabsorbs blood vessels that are no longer needed. This will motivate dieters a lot because a pound of weight may seem insignificant, but if you lose just a little like that It also helps you have a much healthier heart.

2. Excess nostrils

Fact: you can only breathe out through one nostril at a time.

About 85% of humans only breathe through one nose. The interesting thing here is that in these people, the body will automatically switch between two nostrils about every 4 hours depending on body position and health status. This happens thanks to erectile tissues in the nose similar to those in the penis or clitoris. Erectile tissue slowly swells in one nostril, and covers most of the breathing opening while the tissue in the other nostril shrinks, allowing more airflow. More specifically, the side of your nose where you breathe also causes an impact on the body. If you are breathing through the right nose, your blood sugar will increase and force your body to use more oxygen. In addition, breathing through the right nose will stimulate increased activity in the left brain and vice versa. This will be useful in case you need to stimulate activity in the right or left brain area as needed.

3. Runny (shit) nose

Truth: Eating snot is good for your health.

Nasal mucus has the effect of filtering out harmful substances in the air when we breathe, and the product of this process is dirty nasal discharge. So everyone thinks that picking and eating nosebleeds is not hygienic at all, but recent research shows that nosebleeds can help us improve our immune system by bringing these toxic substances inside. in the body in small amounts, helping the body identify and fight against them. However, after reading this information, you should not sit around sniffing and eating them because every day a certain amount of mucus in your nose flows back down your throat due to the movement of your nose hairs.

4. Color range

Fact: women can see more colors than men.

According to a study from the University of California, about 50% of women have 4 types of color receptor cells instead of the usual 3. People with normal vision when looking at a rainbow only see 7 different colors, while people with 4 color receptor cells can recognize 10 colors. The reason for this phenomenon is that in women, red and green color receptor cells are located on the X chromosome while blue color receptor cells are located on the Y chromosome. Meanwhile, color receptor cells Red and green allow us to perceive a wider range of colors. There are even women who have up to 5 color receptor cells. This also explains why there are far more men than women who are color blind.

5. Memory

Truth: we may not remember why we entered a room.

Have you ever walked into a room and couldn't remember why you were there? And then have you ever noticed that sometimes you can remember the cause after you come back out… Here is the answer. Researchers at Notre Dame have conducted several experiments on the effects of rooms on our memory. Participants in the experiment were divided into two groups and given simple tasks while they walked the same distance. The only difference is that one group goes through a door while the other group does not. The results of the experiment showed that people who went through the door forgot their other task three times more often than those who did not go through. Apparently the brain treats the door as an “event boundary” and the decisions you make while inside the room are stored at this boundary when you leave. That's why you can remember if you leave the room.

6. The body loves sweets

Fact: sugar can help heal wounds faster.

Doctors in Africa still treat wounds by placing crushed sugar cane on the wound. Moses Murandu was a nurse who had seen his father use these remedies in Africa and was surprised to find that doctors in England did not use them. He began researching this treatment again and tested it on patients with pressure ulcers and leg ulcers before bandaging the wound. Patients find that sugar can relieve pain and kill bacteria that hinder wound healing. The reason is that sugar is hygroscopic, so it absorbs the water that bacteria need to survive. Sugar is also much cheaper compared to modern antibiotics. So the next time you cut your hand, sprinkle some sugar on it before bandaging the wound.

7. Saliva

Fact: more saliva is produced before vomiting.

This is how the body reacts to protect parts of the body such as the throat, teeth and mouth. We all know that stomach acid has extremely high levels of acidity. The body's secretion of saliva before vomiting helps dilute and neutralize acid and rinse the mouth so that acid overflowing from the stomach does not harm your body. That's why we should rinse our mouth and brush our teeth after vomiting.

8. Feeling alone

Truth: feeling alone is like a physical wound.

Maybe you already know this. But why is that? A team of researchers at the University of California asked volunteers to play a computer game that simulated a simple game of tag between two people. But they did not know that the other player was actually just a computer and it had been programmed to automatically log out after a few minutes, making the volunteer feel alone and rejected. Scientists found that this feeling of loneliness appears and is processed in the anterior part of the cerebral cortex - the same area that processes painful feelings about physical injuries. This explains why people crave social acceptance and seek friends, as well as helps us understand more about the power of "crowd influence". Scientists also hope to use this information to help us explain and find appropriate treatments for psychological illnesses - depression and despair.

9. Second brain

Truth: we have a second brain in our gut.

The human body has about 100 million nerve cells extending from the esophagus to the anus, also known as the enteric nervous system. This “second brain” is not conscious but is responsible for digestion and even more. If you've ever felt anxious or had a warm feeling in your gut when hearing bad news, the cause lies in the enteric nervous system. The enteric nervous system also plays a role in mood formation in general and explains why certain foods can help transform mood and why bad news or negative emotional states put you off. appetite.

10. Swallow and breathe

Fact: Humans are the only mammals that cannot swallow and breathe at the same time.

Other mammals, and even non-mammals, can breathe while eating. In fact, newborns can do this so they can breathe while feeding, but this ability is lost when the baby is 9 months old, when the larynx begins to develop. In humans, the larynx is located too low in the throat compared to other animals, which allows humans to sustain the sound emitted for a longer period of time and produce more vocal sounds, contributing to constitute speech.

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