When you feel too much pressure to be loveless, or when you are overwhelmed by illness, 1 Medicine Network recommends that you look at how our immune system fights, and it is our cells that are trying harder than we are to survive, and it is they who are protecting us with their lives.
There are about 380 trillion viruses lurking in our bodies ready to wreak havoc, and humans are still rampaging through an environment with more than 1,000 different bacteria every day.
In the face of internal and external troubles, human beings can live safely because of the existence of an immune system. The immune system defends against the invasion of pathogens externally and monitors the stability of the body internally. In the microscopic world that we can't see with the naked eye, viruses and immune systems are fighting like waves at every moment.
A sneeze triggers a vicious battle
One day, a flu patient walked through the crowd, and then he sneezed, and a large number of flu viruses in his body entered the air with droplets, and began to look around for a new host.
That's when the first barrier of the immune system starts to fight.
The first immune barrier
The body's skin and mucous membranes belong to the first barrier of the immune system, and when the virus hides in the air and prepares to lurk into the body, the skin will be the first to intercept these bad guys.
However, the virus is very small, and it can easily evade the interception of the skin and enter the respiratory mucosa. At this time, the cilia on the mucosa of the respiratory organs begin to fight, to remove foreign invaders and eliminate bacteria. Stimulated, the body will discharge the virus from the body by sneezing and coughing, and most bacteria will die at this level.
However, some influenza viruses are very cunning, they are very small, they can avoid the removal of mucous membranes, through camouflage, so that cells mistakenly think that the virus is a nutrient needed by the human body, and smoothly mixed into the human body.
When the virus passes the first level, the second line of defense will immediately enter the battle.
Second immune barrier
After the virus enters the human body, it will use the DNA it carries to begin to replicate countless viruses on its own, absorbing the nutrients of the human body and destroying the cells in the body. When the virus began to exert force, the main fighting forces in the second line of defense of the immune system began to become aware and quickly entered the battle.
The combat force of the second line of defense is the bactericidal substances and phagocytes in the body fluids, and the main combat force is the familiar white blood cells. White blood cells are the loyal guardians of the human body. When a virus is detected, white blood cells will sound the alarm and gather more partners to gather around the virus to eat it, and use various enzymes to digest the virus.
The second line of defense is extremely fierce, which can be described as a matter of life and death.
After the virus enters the body, after a period of camouflage reproduction, the number becomes very large. The T lymphocytes in the white blood cells will be the first to find the enemy and throw themselves into battle, the T lymphocytes have a strong desire to survive, will not fight the virus for life and death, they will try to keep the virus out of the door and prevent it from advancing.
But the virus is greedy, and the nutrition in the human body is the paradise they most yearn for. After the virus enters the body, it will try to infect the bacteria in the body in various ways, so that these bacteria become the camouflage coat of the virus and evade the patrol of T lymphocytes.
Viruses that escape T lymphocytes replicate more brazenly when they enter the cell. When it is strong, it will show its evil face, greedily suck the nutrients in the cells, and replicate more viruses. This is when more white blood cells perceive them and sound the alarm, calling more white blood cells to devour and destroy these viruses.
But at this time, the virus was already very strong, and the simple phagocytic clearance of white blood cells could not eliminate them. In order to eliminate the virus, more white blood cells use the method of "killing three thousand enemies and losing eight hundred", and while destroying the virus, white blood cells will also be poisoned. When the human body has symptoms such as sore throat and cough, it is the tragic "mark" left by white blood cells and viruses when they die together.
If the virus is too powerful, the surrounding white blood cells sacrifice more and more, other white blood cells are also a bit overwhelmed, the immune system will start the fever mode, then the performance of the human body is fever, the virus in the high temperature environment survival ability will become weak, such an internal environment is beneficial to white blood cells. The fever pattern is also a signal for white blood cells to move rescuers, and more white blood cells are summoned to come around the virus to participate in the battle.
When white blood cells fight the virus, they are not alone, and the friends of the entire immune system are helping. Blood will speed up the flow, transport more white blood cells to participate in the war, the fibrinogen and platelets in the blood will gather into a network structure, the virus will be trapped, do not let them hide around, so that white blood cells can concentrate on destroying them, and some healthy cells around them will also devour the virus in a sacrificial way to end up with it.
When you have symptoms such as fever, nasal congestion, runny nose, cough, etc., it means that your immune system has been fighting, countless cells in the body are fighting the virus, there are constantly cells dying, and new cells pounce on it to fight, until the virus is destroyed, and the immune system will return to balance.
The second immune barrier is the most powerful combat force of the human immune system, and 90% of the virus will be eliminated at this level. If the virus is lucky enough to survive this level, it may enter the nucleus, and the body may have a very serious infection or even death. At this time, the human body buys itself an "accident insurance" that needs to be activated.
"Accident Insurance" for the Immune System
The third barrier of the immune system is the acquired immune system established by the human body after birth, which is mainly composed of immune organs and immune cells, and functions through various antibodies and immune factors.
Simply put, it is the immune mechanism established by the human body itself to act on a specific pathogen or foreign body. That is, if the human body is vaccinated against influenza, when the escaped influenza virus enters the cell, the memory cells that have been vaccinated against the flu vaccine will be awakened, and then accurately grasp these viruses and destroy them, so that the human cells will not be infected by this virus.
The third immune barrier is equivalent to the immune system buying itself an "accident insurance" that helps cells quickly recognize and destroy enemies when some deadly virus invades the body.
The magic of life is that every organ, every system, and even every cell of the body is a battle-hardened warrior, they are fighting for us every moment, and after hundreds of millions of years of evolution, the immune system has become indestructible. It's just that when the immune system is too strong to kill the enemy, because the combat power is too strong, it will often make the body unable to withstand it, resulting in damage to the human body.
What we need to do is to protect our immune system well, 1 drug network recommends that we do not do things that harm the immune system in normal times, maintain the balance of the immune system, help it at a critical moment, and also let our body get through the difficulties.
More importantly, in the face of powerful viruses, we must buy "insurance" for the immune system through vaccinations and other means as much as possible, so that they can fight better.