The water content of the human body is about 60%, of which the water content of the cerebrospinal cord is about 95%, the water content of the lymph glands is about 95%, and the water content of the blood is about 82%. The water content around the cell is about 75%, and the water content inside the cell is about 80%. The water content in muscle is about 60%, and the water content in fat is about 15%.
Water has many important functions in the body: water is an important component of the protoplasm of cells; Water maintains the acid-base balance in the body; Water is a component and reaction medium for many metabolic processes in the body; Water is a solvent for many substances that play a very important role in physiological processes.
The water content in the baby's body is the highest, between 75% and 80%, and as they age, the water content decreases by a certain percentage. But in old age, the water content in the body will decrease to 50 to 60 percent.
Water is the most abundant component in the human body. As long as 15% of water is lost, lives are in danger. A normal adult man weighs 60 kilograms and has a body water content of 40 kilograms; The woman weighs 50 kilograms and has a body water content of 35 kilograms. People of the same weight have the highest water content in their children.
People can't live without water, but drinking too much water can cause poisoning. As you know, water makes up about 65 to 70 percent of the body's body weight and is relatively stable in the body. Therefore, drinking too much water can cause "water poisoning". Some people often drink a lot of water due to excessive sweating in summer, or eat a lot of watermelon and other fruits with high water content to quench their hunger and thirst, resulting in a large amount of excess water retention in the body, resulting in a decrease in plasma osmotic pressure and an increase in circulating blood volume. Therefore, water poisoning caused by drinking too much water is clinically called "hyponatremic water poisoning".
Water poisoning has a great impact on the human body. It can make the stomach and intestines full and bloated, and the kidneys will be overburdened, leading to difficulty urinating and a drop in body temperature. Under normal circumstances, the body's intracellular and extracellular water fluids maintain a certain balance. Once this balance is broken, it will cause a series of pathologies such as edema and swollen brain cells. In particular, when brain cells are enlarged, intracranial pressure increases, causing dizziness, headache, nausea, vomiting, memory loss, shortness of breath, irritability, drowsiness, and even coma. In severe cases, it can be life-threatening.
So, how much water should a person drink per day is appropriate?
It varies from person to person. Normal** water requirements can be calculated based on body weight: daily water requirement (ml) = body weight (kg) x 40 (ml). For example, a person weighing 70 kg needs about 2,800 ml of water per day. Since some of this water is obtained from food (about 1000 ml), an additional 1800 ml of water is required per day. However, each person's water needs will vary depending on temperature, age, weight, and health. Adults living in mild climates with light physical activity should drink at least 1,200 ml of water per day. Under the conditions of high temperature or strong physical labor, it should be increased appropriately. It is also important to drink plenty of water when you are sick, especially if you have a fever, because for every 1°C increase in body temperature, your metabolism increases by 10% to 12%, and you need more water to metabolize. In addition, hot water is easier to absorb through ** than cold water, and it is conducive to sweating, so it is advisable to drink more hot or warm water in summer.
In summary, "water intoxication" is a clinical syndrome in which the total body fluid is hypotonic or hydrotoxicated due to the body's ingestion or infusion of too much water. Due to the decline of physiological function, the concentration function of the kidneys is reduced, and the ability to regulate water is reduced, if the elderly do not pay attention to controlling water intake, it is easy to cause water retention, hyponatremia and water poisoning. Therefore, the elderly should pay special attention to the scientific nature of drinking water.