Dehydration of the human body, the symptoms and signs of dehydration, prevention of dehydration in
Water is a biological need of the human body at the cellular level. It is difficult to give a simple and universal answer regarding how much water a person should drink per day. It all depends on the time of year and natural areas, but firmly can say one thing – without water a person can survive from 3 to 10 days.
This variation in time is asociated with the ambient air and physical activity, and psychological state of the person. The lack of water dramatically increases the feeling of thirst, but even worse immoderate consumption, which can lead to sudden swelling and death.
In a deserted area of water for human paramount importance. Even the food is not so important for the preservation of life. Dehydration is deadly
both in hot and in cold weather. The view that the proces of dehydration can occur only at high temperatures, when the body is struggling with overheating, is erroneous and dangerous.
At negative temperatures, the water loses are being reduced are very significant not only due to the excesive sweating during intense physical activity, but also because of the warm, constraining movement of the clothing have to do the work.
Water based digestion, water lubricates joints and helps to remove waste products of vital activity, it is required for the exercise of breathing, as the lungs need constant moisture to saturate the blood with oxygen and remove exces carbon dioxide.
Dehydration occurs as a result of low temperature and drynes of air entering the lungs, to which he responds, primarily, by increased excretion of urine (cold diuresis). Increase urination, in addition to the los of fluid even increases in the body los of sodium chloride and caused violations of water-salt metabolism.
The table clearly demonstrates the development of symptoms of dehydration depending on the percentage of los of water to body weight.
Symptoms of dehydration
Dehydration to the body weight (%)