The material composition of the human body
The human body consists of water, protein, lipids, carbohydrates, inorganic salts and vitamins, in which water accounts for 55%-67% of the total human body, protein accounts for 15%- 18%, lipids account for 10%- 15%, and carbohydrates account for/kloc. All tissues in the human body contain water. The water content in blood is as high as 97%, about 70% in muscle, 20%-35% in fat and 25% in bone. Even hard teeth contain 65,438+00% water. Therefore, water is everywhere in the human body.
What are the physiological functions of dihydrate?
Water is not only the main component of the body, but also the medium and participant of all chemical reactions. Without water, physiological functions such as blood circulation, respiration, digestion, absorption and excretion cannot be maintained, and metabolism in the body cannot be carried out. Water is also a medium for nutrients and excreta to move in the body. It transports nutrients to all parts of the body through water, and at the same time, it excretes wastes produced in the body through water. In addition, water can also lubricate and regulate body temperature.
How much water should I drink?
The amount of urine excreted by human body in one day is about 1 1,500 ml, and the total amount is about 2,500ml with the water consumed from feces, breathing or skin evaporation, while the water that human body can replenish from food and body metabolism every day is only about 1 1,500 ml, so normal people should drink at least 1 1,500 ml of water every day. According to the Survey Report of China Residents' Diet, the daily drinking amount of women is 1.500 ml, and that of men is 1.700 ml, which is the amount of eight glasses of water that people often say. In fact, these drinking water quantities are the theoretical water requirements at quiet room temperature. How much water each person actually needs to drink will vary according to his age, weight, exercise, environment and even weather conditions. How can we judge whether we drink enough? Tell you a simple way to judge, according to the color of urine. If the urine color is light yellow or? Lemon color means that the water intake is just right, and the urine color is dark yellow or dark yellow, indicating that the water intake is insufficient and needs to be replenished quickly. If the urine color is clear and colorless, the amount of drinking water can be reduced appropriately. Therefore, the amount of drinking water varies from person to person, and it will also be affected by various factors.
How to drink water and what kind of water is more scientific and reasonable?
Many people's understanding of drinking water is limited to quenching thirst, that is, drinking water only when they are thirsty. When people feel thirsty, it means that their bodies have lost at least 65,438+0% water, so don't wait until they are thirsty to drink water. They should develop good drinking habits and drink water every 2 hours or so.
Boiled water is the best drink. Does not contain calories, and can be directly absorbed and utilized by the human body without digestion. It is recommended that you drink warm water of about 30 degrees, which will not stimulate the peristalsis of the gastrointestinal tract too much and will not easily cause vasoconstriction. Ice water and cold drinks with too low temperature will reduce the temperature in the stomach and affect the secretion of gastric acid and the activity of digestive enzymes. If the temperature is too high, especially over 65 degrees, the risk of esophageal cancer will increase.
Drink water slowly, bite by bite, and drink a glass of water within 5 to 10 minutes. Drinking a lot of water at one time will increase the burden on the kidneys and heart, causing discomfort such as shortness of breath, chest tightness, nausea and dizziness.
Drinking the first glass of water after brushing your teeth in the morning can promote the peristalsis of the gastrointestinal tract, help the kidneys and liver to detoxify, replenish the water lost by body metabolism at night and clear the brain.
Drink a glass of water before going to bed, because people are in a relatively static state at night, and their water intake is reduced. In addition, water is lost through breathing, skin and urine, blood flow is slow, and the risk of myocardial infarction will increase. Drinking a glass of water about an hour before going to bed can effectively prevent the occurrence of myocardial infarction and stroke. Drink some water properly after getting up at night. It is suggested that you put a glass of water in front of the bed for drinking, but don't drink too much water before going to bed, so as not to get up at night and affect the quality of sleep.
Drinking a glass of water before exercise will provide more nutrition and oxygen to muscles and tissues when there is enough water in the blood, so that the body is not easy to get tired.
Drink plenty of water when drinking. Alcohol has diuretic effect, which dilates blood vessels and raises body temperature, leading to water shortage. Drinking more water can not only dilute alcohol, accelerate alcohol excretion, but also relieve discomfort such as thirst after drinking.
When you suddenly feel tired, anxious, irritable, or distracted, it may be a sign of water shortage in your body. Drinking a glass of water at this time may make you clear-headed and refreshed.
Water is the source of life. For the human body, water is not only an important part of the body, but also a carrier for transporting various nutrients and metabolites. It is also the medium and participant of all chemical reactions. Therefore, ensuring adequate water intake is very important for the normal operation of human physiological functions. Drinking water is a science, and drinking water correctly is very important for health.