How much water is in the human body and how much water is in the human body

Human body fluids account for 55-60 of body weight, which can be divided into extracellular fluid (accounting for 15) and intracellular fluid (accounting for 40-45). More than half of a person's body weight is water. 80 of the blood, 70 to 80 of the organs are water, and even hard bones contain 10 to 40 of the water.

If you don't hydrate properly, your body can quickly lose water due to urination and sweating, which can lead to dehydration. A person should excrete 1000-1500 ml of water every day when urinating, 100-200 ml of water for defecation, 600-700 ml of water for sweating, and 300 ml of water for lung breathing, that is, at least 2000 ml of water. Therefore, a person should replenish at least 2000 ml of water a day.

Nothing is more important than water, but no one knows how much water a person needs to drink, mainly because it is difficult to measure how much water a person consumes from drinks and food, how much stored water is used, and how much water is converted into urine and other body fluids. A research team at the University of Wisconsin-Madison in the United States used a new method to measure water intake and urination in healthy people, and they provided 458 men and women between the ages of 40 and 79 with a specially labeled water, which was evenly distributed throughout the body, allowing researchers to calculate how much water was stored in the body and how much water was excreted in urine. This kind of advice can be wrong or even harmful. Studies have found that although most older people drink less than 8 glasses of 225 ml per day, there is no evidence that people aged 70 to 79 are dehydrated.

They point out that older people can just drink plenty of water when they feel too hot or have a fever. The results of the survey are as follows: Water needs vary widely from person to person, and a person's daily intake can range from the lowest to the highest liter without dehydration.

Although the average water intake of older people is less than that of younger people, they do not become dehydrated. There is only a slight difference in water intake among people of different ages. Thirty-eight percent of the population consumed less than the normal recommended amount, although they did not experience dehydration.

Urine accounts for 66% of the body's total water output, not 50% as previously assumed.

The water content of the human body is 60%-95%.Dryness due to lack of moisture can be broadly divided into two types. One is drinking too little water; The other is like Section Chief Kim, who has taken in a lot of water, but his body is still dry.

The cause of these conditions is an imbalance of water in the body. But why can't I keep my water balance even even after drinking enough water? Our bodies are like water tanks.

The water content of the human body is 60%-95%.Even though the surface** becomes very dry, the body is still full of water. Just like a fetus in amniotic fluid, our cells are actually soaked in water.

The water content of each organ in the human body varies. Water is 75% of the brain, 75% of the heart, 86% of the lungs, 86% of the liver, 83% of the kidneys, 75% of the muscles, 94% of the blood, 80% of the cartilage, and 50% of the connective tissueEven 10% of fat cells and fat molecules are water.

As long as the body lacks 1% 2% water, the organs do not get enough water and nutrients, and the brain soaked in cerebrospinal fluid can lose as little as 1% water can lead to fatal consequences. When there is a lack of water in the body, a person feels thirst and pain, which is a signal of lack of water from the organs in the body. If this signal is ignored, the organs will be damaged and unable to function properly, leading to various diseases and aging.

Not only are the countless organs in the body and the countless cells that make up them soaked in water, but even the inside of these cells is filled with water. Water inside and outside cells communicate with each other to transport nutrients and waste from the body. Cells reside in water, and these waters are messengers that transmit information.

People, so to speak, are made of "water", which makes up about 75% of our body weight. Every organ of our old people is extremely rich in water, 80% of the heart, 76% of the muscles, 68% of the liver, and 22% of the bones.

When the lack of water in the body accounts for 1% of the body's body weight: it will feel thirsty; When it accounts for 2%, it will produce a sense of depression and loss of appetite; When it accounts for more than 3%, it may cause difficulty concentrating, headache, irritability, and even syncope.

More than 9%-12% of body weight: it is likely to be fatal.

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.

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's body is 80%, and the water content of the elderly is only 50%-60%.

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 in their bodies, and the elderly have only 50%-60% of water in their bodies.

The water contained in various organs, tissues and organs of the human body is also different, and the more active the metabolism, the higher the water content of the tissues. 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.

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 human reed 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 it will die.

Like other living things, humans are inseparable from water, which accounts for about two-thirds of the total weight and solid matter for only one-third of the weight. Of course, this number will vary from person to person. Generally speaking, with age, the water content of the human body will decrease accordingly, and the fetus will be 90%; 80% for neonates; 75% for juveniles; 65% for adults; The elderly have dropped to only about half.

This number will also vary depending on the tissue organ: the tooth has a minimum water content of 10%; 25% for bone; 30% for fat; 72% for muscle; Blood has a water content of up to 97%. From a cellular point of view, there are two main types of water: intracellular fluid and extracellular fluid.

The so-called intracellular fluid is the water that gathers inside the cell, accounting for about 55% of the total water of the human body, and the extracellular fluid includes a wide range, such as blood, intercellular fluid, cerebrospinal fluid, synovial fluid, etc., which are located outside the cell and account for about 45% of the total water. The human body contains so much water, so what role does it play in the body? First of all, water is an important component of the human body, one of the necessary substances for life, without water, there can be no life activities.

Secondly, water is the best solvent, and many nutrients must be dissolved in water before they can be absorbed and utilized by cells. Most of the biochemical reactions in the human body are carried out in water. So without water, you can't talk about metabolism.

In addition, water is the best transport carrier, and the function of the human circulatory system is realized through blood flow, as mentioned earlier, 97% of blood is water. In addition, water is an important factor in regulating body temperature, acting as a lubricant and improving the vitality of the body. It is often said that:

You can go three days without food, but you can't go a day without water. "It has been determined that if the human body loses 2% of its water, the mouth and tongue will become dry; 5% will feel irritable if they lose water; Dehydration occurs in 10% of cases; If you lose 15% of your water, you will be unconscious. If there is further water loss, it will be life-threatening, which shows how important water is!

The human body must maintain the balance of water, and the total amount of water intake and excretion must be basically balanced, otherwise there will be problems and lead to diseases, which is the basic reason why people drink water and excrete. Seek adoption.

As we age, the proportion of water in our body weight decreases. The proportion of water in the human body is known to be roughly as follows: fetus (three months old) 90, newborn babies 80, boys 75, adult men 70, and elderly men less than 65.

In the human body, water accounts for 70%, brain tissue accounts for 80%, blood water is as high as 90%, and even bones have about 15% water. Water is the main body fluid in the human body, and it has the important function of balancing body temperature and ensuring the normal progress of metabolism.

Adults make up about 60-70% of their body weight with water in their bodies. Among them, 99% of the water is in the cerebrospinal cord, 94% is in the lymph glands, 70% is in the blood, 62% is in the muscles, and 5% is in the bones.

Water makes up about 70% of the human body. Men have more water in their bodies than women, younger people have more water than older people, and newborns have about 70% to 75% of water in their bodies. The amount of water in the tissues of the human body is also different:

Water distributed in bones and cartilage accounts for about 10% of the total amount of bone; Water in the fat accounts for about 20% and 35% of the total fat; The distribution of water in the muscles has reached about 70% of the total muscle mass; In the plasma, except for 6% and 8% plasma protein, about glucose and about about inorganic salts, the rest of the components are all water, accounting for about 91% 92% of the total plasma.

According to biologists, adults have about 60-70% of their body weight for water. Among them, 99% of the water is in the cerebrospinal cord, 94% is in the lymph glands, 70% is in the blood, 62% is in the muscles, and 5% is in the bones.

When the fetus is conceived in the mother's body, water accounts for 90% of the body weight, when the baby is born, water accounts for 80% of the body weight, the proportion of water in the adult body drops to 70%, and after old age, the proportion of water in the human body drops to 50%-60%.

Water makes up about 70% of the human body. Men have more water in their bodies than women, younger people have more water than older people, and newborns have about 70% to 75% of water in their bodies. The amount of water in the tissues of the human body is also different:

Water distributed in bones and cartilage accounts for about 10% of the total amount of bone; Water in the fat accounts for about 20% and 35% of the total fat; The distribution of water in the muscles has reached about 70% of the total muscle mass; In the plasma, except for 6% and 8% plasma protein, about glucose and about about inorganic salts, the rest of the components are all water, accounting for about 91% 92% of the total plasma.