After the astronauts return to Earth, why can t they walk on the ground, but have to be carried by p

After the astronauts return to Earth, why can't they walk on the ground, but have to be carried by people?

Once in space, everything floats in weightlessness, and the human body is no exception. This makes it impossible for humans to distinguish between up and down, front and back, left and right, east and west, north and south, and the vestibular system and associated nerves of the brain are disturbed, one manifestation of which is uncontrollable nausea, and despite the various extremely difficult training that each astronaut undergoes to overcome these physiological responses, their brain still thinks that they are completely out of control in weightlessness.

The return to Earth takes only half an hour, which is far from enough for the brain to adapt to the spatial orientation and the effects of gravity. When I stood up, it was like getting drunk and staggering and couldn't find my way.

Staying in space for a long time, human muscles and bones are constantly decreasing after space, which is the most lethal effect. Due to the lack of exercise and gravity, the burden on the body is minimal. After entering space, the human body quickly loses these two important body structures.

Bone loss is very dangerous. Upon returning to the Earth's surface, the human body has to bear not only its own weight again, but also a cabin suit with a total weight of about 20 kg, which makes astronauts prone to fractures during strenuous exercise.

This fluid change will have a huge impact on the human body, especially for cardiovascular and cerebrovascular diseases. The intracranial pressure in the brain increases a lot, and the blood pressure also increases. Eye pressure increases, vision is affected, and the taste and smell systems are greatly disturbed.

Both the humoral circulation and blood circulation will be forcibly regulated by the body to accommodate this change. If they return to the Earth's surface in a short time, these circulatory systems cannot be restored in a short time, which is why all astronauts have to lie down on the one hand to adapt to overweight and vibrational shocks, and on the other hand, to adapt to huge changes in body fluids and blood circulation.

This is because after returning to Earth, the astronaut's body is very uncomfortable, there is a certain amount of discomfort, and there is still a weightless reaction, so there is such a situation.

At this time, the earth is caused by the earth's gravity, and astronauts cannot adapt to the earth's gravity well and are easily injured, so they will choose this way so that they can recover.

Because after astronauts go to space, their bodies will have some changes, and after returning to the earth, the body cannot walk upright, which is not suitable for the gravity of the earth.

Astronauts often stay in space and adapt to the gravity-free environment of space, so it is inevitable that they will be a little uncomfortable to return to Earth all at once.

Astronauts are carried back to Earth because their physical condition does not allow them to walk on the ground. If they walk down the ground as soon as they get back to the ground, it will be a huge danger to the body.

After landing, astronauts have a process of adapting to gravity, and their bodies will undergo a series of changes from weightlessness to gravity. After landing, it is necessary to adapt from the cabin to the outside of the cabin, and then slowly to the same as a normal person, so the medical supervision and medical insurance personnel are present to continue to pay attention to and care for the physical condition of the astronauts.

After astronauts travel from Earth to space, the difference in the environment has caused great changes in the body. Therefore, after returning to the ground, they need to go through at least half a year of ** and recuperation before they can return to their previous physical state.

Related Notes:

The astronauts returned to Earth and carried them because their blood pressure was unstable and they were likely to faint. In the weightless environment of space, they are floating, so the internal organs are also floating, and the body fluids will also flow around, unlike when they flow up and down on the ground, so the amount of blood pumped to the head will be greatly reduced, and astronauts will also have venous sinus congestion, facial fatness, eye socket puffiness and other phenomena.

After the astronauts landed, the medical superintendent medical staff will give them electrolytes and nutrient solutions in time to reduce the cardiovascular impact on the body. Because of this condition, if they stand up after returning to Earth, they will feel dizzy, headache and even faint, so they have to carry them around.

Astronauts return to Earth and carry them because their muscles are atrophied and their bones are so fragile that they are prone to fractures and cannot walk. According to the data, astronauts lose 20% of their muscles within 5-11 days of entering space. An astronaut loses as much bone mass in orbit in one month as an elderly person loses in a year on the ground.

The above content reference: Encyclopedia - Astronaut (a person who flies in space as a profession).

Because in space, the astronaut has lost calcium in his body, so the astronaut is unable to stand. For many people, the past two years are undoubtedly a very helpless and painful two years, because of the impact of the new crown epidemic, resulting in many uncontrollable phenomena frequently appearing, recently, many astronauts who have returned from space to earth, why can't they stand, this news has attracted the attention of many friends, and even made many people feel a little surprised, after learning about this kind of land news, many friends have made guesses, in addition to the above explanations, is there any other explanation?

The problem of muscle atrophy is well known, because of the rapid development of science, many countries have also understood that it is necessary to establish some sports equipment on the International Space Station, because in the zero-gravity environment, exercise can only reduce the degree of muscle atrophy to a certain extent, but, in fact, to a large extent, this will not help the body's nutritional recovery, so calcium supplementation drugs are also irreparable, so after the astronauts return to the earth, they need to return to the earth and gradually and slowly recover. <>

The rules of the universe An astronaut of NASA, he personally spent 197 days in space, as the first step to recover from weightlessness after returning to Earth, he must learn to walk again, so we all know that there is actually no gravity in outer space, because they work in space, they have always been in a state of weightlessness, in addition, the living environment in space is different from that on Earth, and there are many things that they cannot accept after returning to Earth. <>

The instinctive reaction can only be said that these astronauts are great, they have undergone rigorous training, but because it is the instinctive reaction of the body, it is not something they can control, so they come back from space, the body cannot quickly adapt to the living environment of the earth, the action is not harmonious, it is difficult to imagine what it is like, so, they can only sit in the chair, first of all, to adapt to the environment. <>

Because the astronauts wear very heavy space chamber vertical suits, coupled with the lack of gravity in the space ruler, it is difficult to adapt to the time when there is gravity on the earth. So unable to stand.

Because I am not adapted, I have been in space for a long time, so I am used to the situation of vacuum, and suddenly there is the gravitational pull of the earth, which will be very uncomfortable.

Because astronauts are in a state of weightlessness in space, when he and the photographers return to Earth, they will be squeezed by gravity and pressure, which will have a certain impact on their bodies and internal organs, so there is no way to stand.

With the exploration of outer space, the secrets of the universe are being revealed by us little by little. And we all know that in outer space, although there is air, the air is also extremely thin, similar to the existence of a vacuum. And the reason why the spacecraft can fly into space is actually by reaction force.

It is for this reason that astronauts will be very uncomfortable when they come back from outer space. Because in outer space, people belong to a floating state, and a slight jump may be more than 2m high. On Earth, people do not float in the air due to gravity and the attraction of the earth.

Then when astronauts return to Earth, they will not be able to walk because the way they walk in space is different from the way they walk on Earth. And the difficulties that astronauts have to overcome are not limited to walking.

If you want to become an astronaut, you must first be physically strong, have a good level of education, analytical and problem-solving skills, and also have a strong mental quality. In addition, astronauts must have a very thorough understanding of the scientific knowledge and skills of manned spaceflight. In addition to physical and intellectual reserves, astronauts also undergo physical and mental training.

For example, you need to go to a centrifuge with gravity reaching 10 pounds of Earth's gravity and train in a soundproof chamber for a long time.

And according to the different tasks of each astronaut, the skills that astronauts have to learn are also different, such as the three astronauts on Shenzhou 12 in China, there are missions out of the capsule. Three astronauts need to work together to help the other two astronauts get out of the capsule smoothly and complete the designated mission. In addition, astronauts also need to learn medical-related skills, because in outer space, astronauts need to check their physical fitness when they are in the space station or spacecraft for a long time, and send the inspection report to the ground in time so that the ground personnel can summarize their experience.

Therefore, every astronaut, every successful launch of manned spaceflight, there are a lot of hardships and efforts behind it. And what seems easy to us to accomplish will be very difficult and life-threatening in outer space. This time, the astronaut of our Shenzhou-12 manned spacecraft needs to survive in the space station for three months and complete two out-of-cabin missions.

Hopefully, they will be able to complete their tasks successfully and be in good health.

Because there is no earth's gravity on the moon, they are mostly floating in mid-air, which is the so-called feeling of weightlessness, so they are not very adaptable to it after returning to the earth, so this situation occurs.

The main space is weightless, and there is no gravity and gravity in space, so astronauts have become accustomed to the environment of space. When I return to the earth for a while, because the earth has gravity and gravity, it is inevitable that I will not adapt.

Mainly because there is no gravitational force in space, which leads to them being learning how to walk in space all the time, and long-term development will lead to their lack of adaptation to landing, and it takes a long time to change some habits in space.

This is because they have been in a state of weightlessness in outer space for a long time, and after returning to Earth, they find that they have no way to adapt to gravity at all, and they are in a state of floating for a long time, and it is easy for them to not walk.

Astronauts return to Earth in a return capsule.

The re-entry capsule, also known as the cockpit, is the "cockpit" of the astronaut. It is a closed structure with a hatch at the front end. After the re-entry module and the propulsion module are separated, the re-entry module returns, the propulsion module burns up, and the orbital module is equivalent to an earth observation satellite or space laboratory, which will remain in orbit for a period of time.

The capsule will re-enter the atmosphere under the action of gravity when returning, and the ever-changing airflow will make it difficult for the high-speed flying capsule to maintain a fixed attitude, so it is necessary to make the re-entry capsule in the shape of a tumbler, with a large bottom and a small head, and is not afraid of the disturbance of the airflow.

Cause: Astronauts have increased bone loss in microgravity. Experiments have proved that in the microgravity environment of space, not only people will lose bone calcium, but even the mechanism of bone calcium formation will also be problematic.

Since 1961, when humans first broke out of Earth, all astronauts have been lifted out of the re-entry capsule.

After they return to Earth, they will have "weak legs" for a long time, not to mention walking, and they will not be able to stand up. It must be something that has changed in the cells that support life.

At 1:38 a.m. on April 6, 2016, China's first microgravity scientific experiment satellite "Shijian-10" was successfully launched.

This satellite, which is specially designed for scientific research, carried 19 "passengers" to the sky for space science experiments.

Through analysis experiments, it was found that the activity of stem cells in space to promote the expression of genes and proteins related to bone cell differentiation was reduced. The amount of stem cells that turn into bone cells is much smaller than the amount produced by experiments done on Earth.

The reason why human cells can connect with each other to form a network structure is because of the extracellular matrix connecting with each other. Integrins are proteins that connect the inside of cells on one end and the extracellular matrix on the other.

On Earth, the extracellular matrix outside the cell is subjected to forces and its morphology changes. They send aggregate messages to integrins, which bring integrin-linked proteins together to form focal adhesions.

These spots are important because they activate the activity of intracellular enzymes, induce protein activation in the cell and promote osteopoiesis.

The stem cells on Practice 10 reduce the ability to produce bone cells because of the possibility that focal adhesions may not form properly in weightlessness.

Osteoporosis is a matter for everyone on Earth: astronauts are unable to produce bone calcium normally due to their weightless environment.

People on Earth, as they age, develop the same problem. Understanding this mechanism could help us develop molecular drugs that work on osteopoiesis.

That's because astronauts will be injured in the process of returning to Earth, and it will be more serious, so someone must carry it.

This is because their environment in space is different from that of the earth, especially in that weightless environment, their muscles and organs cannot immediately adapt to the pressure of walking on the ground for a short time, and if they walk on the ground immediately, it will cause irreversible damage.