Water is an indispensable medium for biochemical changes in all physiological processes of human body. Water has strong solubility and ionization ability (water molecules have strong polarity), which can make water-soluble substances exist in dissolved state and electrolyte ion state. Even some fats and protein can be dissolved in water under proper conditions to form emulsion or colloidal solution. Substances dissolved or dispersed in water are beneficial to effective chemical reactions in the body.
After food enters the cavity and gastrointestinal tract, it can only be digested and absorbed by digestive juice secreted by digestive organs, such as saliva, gastric juice, pancreatic juice, intestinal juice and bile. The content of water in these digestive juices is as high as over 90%.
2. Participate in metabolic function
In the process of metabolism, substance exchange and chemical reaction in human body are all carried out in water. Water is not only the medium of biochemical reactions in vivo, but also participates in chemical reactions such as oxidation, reduction, synthesis and decomposition in vivo. Water is the guarantee of normal metabolism of various chemicals in the body.
If the human body is short of water for a long time, the metabolic function will be abnormal, which will slow down metabolism, accumulate too much energy and fat, and make people obese.
3. Carrier transportation function
Because water has good solubility, strong fluidity and is contained in various tissues and organs in the body, water acts as a carrier of various nutrients in the body. Water plays an extremely important role in the transport and absorption of nutrients, the transport and exchange of gases and the transport and excretion of metabolites. For example, oxygen, vitamins, glucose, amino acids, enzymes, hormones, etc. are delivered to the whole body; Metabolic wastes such as urea and uric acid are transported to the kidneys and excreted with urine.
4. Regulate the inhibitory function
Water has a high specific heat and can regulate body temperature.
The best way to prevent heatstroke is to drink plenty of water. This is because people think that with the participation of water, the intake of nutrients in the three major productivity uses oxygen to carry out oxidative metabolism and release energy, and then through the evaporation of water, a large amount of energy can be released to avoid temperature rise. When the human body is short of water, it is difficult to release excess energy in time, thus causing heatstroke.
In addition, water can also improve body fluid circulation, regulate muscle tension, and maintain the osmotic pressure and acid-base balance of the body.
5. Lubrication and moisturizing function
It is dangerous to do exercise without water. Because tissues and organs lack moisture lubrication, they are easy to wear. Therefore, it is best to drink plenty of water before exercise 1 hour.
The activities of joints, ligaments, muscles and membranes in the body are lubricated by water. The viscosity of water is small, which can lubricate the friction parts in the body, reduce the friction of internal organs, prevent damage and make the organs move flexibly.
At the same time, water also has the function of moisturizing, keeping body cells moist and keeping skin full and soft. Regular and quantitative hydration will make the skin particularly moist, full and elastic. It can be said that water is a good product for skin care.
6. Dilution and detoxification functions
People who don't like drinking water are often prone to acne, because water is bound to participate in detoxification. Without enough water, it is difficult for toxins to be effectively discharged and accumulated in the body, which is easy to cause acne.
In fact, water not only has good solubility, but also has important dilution function. When the kidney excretes water, it can also excrete metabolic wastes, poisons and excessive drugs in the body, reducing the absorption of toxins in the intestine and preventing harmful substances from accumulating in the body for a long time and causing poisoning. Therefore, when taking the medicine, you should drink enough water to effectively eliminate the side effects caused by the medicine.