How much water is in the human body?

The proportion of water in the human body is different at different times: in infancy, water accounts for 80%-90% of the human body; In adulthood, water makes up 75% of the human body; In old age, water makes up 65% of the human body.

Although I am a middle school student, what I say is not convincing......But I remember very well that it was said that it was written 60% (*.)

How much water you have drunk, and the water you have in your womb, is subtracting the water that has been excreted, and dividing it by the water of your blood.

It seems to be - probably - almost - should - probably - uncertain - estimated to be (80)%.

In an adult body, water accounts for 70% of body weight, 50% of the body weight of the elderly, and 80% of the body weight of infants; So much water is distributed in **? -- 90% in blood, 85% in brain tissue, 75% in muscle, and 50% in bones. If the human body loses 10% of its water every day, it will get sick, and if it loses 20% of its water, it will be life-threatening.

Scientific experiments have shown that water is the foundation of the human body, and the amount of water in the human body varies according to its different stages of development. The water in the fetus accounts for about 90%, 80% in infancy, 70% in young adults, and 60% or even 50% in middle-aged and elderly people, so the aging process of people is also a process of water loss. ** is one of the largest organs in the human body, accounting for about 16% of body weight.

The water contained in various organs, tissues and organs of the human body is also different, and the more active the metabolism in the body, the higher the water content of the tissue. The water content of human blood and kidneys accounts for 83%; 80% in the heart and lungs; Water makes up 6% of muscles; 68% in the liver; 75% in the brain; Even bones that appear to be strong have more than 20% water.

About 60% of the human body is water, and the metabolism of cells and the exchange of substances in the microcirculation are carried out in aqueous solution.

In the human body, water can also regulate the body temperature of the remaining joints, transport nutrients and oxygen, remove waste products and toxins, and lubricate and protect tissues and organs.

The total daily water intake of a person is about 2500 ml.

There are 3 inlets and 4 outlets for water intake and metabolism.

Entrance: First, drink water. Including a variety of water, such as boiled water, mineral water, beverages, tea, about 1200 ml.

Second, food. For example, foods such as radishes and tomatoes contain water, as well as rice. Chinese like to drink soup and eat hot noodle soup, as well as porridge, these foods contain a lot of water, about 1000 ml.

At a standard room temperature of around 20, the total output of water is also about 2500 ml.

Exports: First, kidneys. It is excreted in the form of urine, which is generally about 1500 ml a day.

Second, breathe. When a person breathes, they exhale some water from their lungs, about 350 ml per day.

Third**. At room temperature, a person will generally evaporate 500 ml of water a day by **. There are more summers and less winters, and the amount of exercise is different, and the amount of water evaporated is also different, which varies greatly.

Fourth, stool. People excrete 150 ml of water a day through their stool, but people with constipation and diarrhea vary greatly.

Under normal circumstances, ordinary people should drink 1200 1500 ml of water every day, but when it is hot, you should pay attention to drinking more water, and people who sweat a lot or exercise a lot should also drink more water.

Some people say that you need to drink 8 glasses of water a day, and some people say that you need to drink 12 glasses of water, so whether it is 8 glasses of water or 12 glasses of water, this varies from person to person, and there is no one-size-fits-all quantity.

How do you know if you're drinking the right amount of water for a day?

There are two main indicators to observe:

One is to see if you are thirsty, and it is not right to drink water when you are thirsty. If you drink the right amount of water, you should not feel thirsty.

The other is to observe the color of the urine and the amount of urine produced. Under normal circumstances, the urine is pale yellow, and the amount of urine produced a day is about 1500 ml, and it is generally urinated once every 3 to 4 hours. If you don't want to go to the toilet for half a day, or the urine excreted by the limbs is dark yellow, it means that you don't drink enough water; On the other hand, if you go to the toilet frequently and your urine is as clear as water, you have drunk too much.

Judging from the weight of the person, most of the human body is made of water. Water accounts for 70% of the body's weight, babies have 80% of water content, and the elderly have only 50%-60% of water contentThe water contained in the various organ groups and organs of the human body is also different, and the more active the metabolism of the tissue, the higher the water content.

The water content of human blood and kidneys accounts for 83%; 80% in the heart and lungs; Water makes up 6% of muscles; 68% of the liver is old; 75% in the brain; Even bones that appear to be strong have more than 20% water. Life is made up of cells, and cells must be "soaked in water" to survive. Dryness is the main manifestation of aging.

Young people account for 42% of intracellular water, while older people account for only 33%, resulting in wrinkles and gradual shrinkage of subcutaneous tissues. The process of aging is the process of losing moisture. People can go without meals for a few days, but they can't go a day without drinking water, and if the human body loses 15%-20% of its body weight, its physiological functions will stop, and then it will die.

Water in the human body is constantly circulating and exchanging between various organs and systems. As much as 200 litres of water are filtered out of the blood vessels in a single day, and the kidneys return it to the bloodstream. The water in the human body is renewed every 18 days, and we usually say that blood is the most important liquid, but the water that flows, lubricates, warms, and clears heat, and the water that dissolves various substances and carries various molecules that nourish us, is the real liquid on which life depends.

From the perspective of human weight, most of the human body is made of water, water accounts for 70% of the weight of the human body, the water content of the baby is 80%, and the water content of the elderly is only 50%-60%.

It is often said that women are made of water, but in fact, not only women, but also men, and most of all people's bodies are made of water. Let's talk about how much water is in the human body.

01 From the perspective of human weight, most of the human body is made of water. Water accounts for 70% of the body's weight, babies have 80% of water content, and the elderly have only 50%-60% of water content

02 The water contained in various organs, tissues and organs of the human body is also different, and the more metabolically active the tissue, the higher the water content. The blood and kidneys contain 83% of the water; 80% in the heart and lungs; Water makes up 6% of muscles; 68% in the liver; 75% in the brain; Even bones that appear to be strong have more than 20% water.

03 Life is made up of cells, and cells must be "soaked in water" to survive. Dryness is the main manifestation of aging, with 42% of the water in the cells of young people and only 33% in the elderly, resulting in wrinkles and gradual shrinkage of the subcutaneous tissue. The process of aging is the process of losing moisture.

If the human body loses 15%-20% of its body weight, its physiological functions will stop and then die.

The water in the human body accounts for 65 70, that is, a person weighing 70 kilograms contains 45 kilograms of water in his body. The blood has the highest water content, accounting for about 90; The brain contains about 81 water; The water content in the muscles is about 75%; In the driest bones, it also contains water28. And in human tears, 98 are all water, and urine and sweat also contain a lot of water.

70% of body weight for men and 60% of body weight for women