wholesale Stockings

We must know that the body in the metabolic process, always generate heat to maintain body temperature, these heat conduction to the body surface through the blood circulation to the outside divergence by radiation, conduction, convection and evaporation.Body Black Slinky Wrap Dress With Draped Sleeves resistance and strong people, normal temperature control mechanism by regulating the two processes of heat production and heat balance, when the temperature tendency to decline, the increase in heat production, heat dissipation to reduce the body temperature remained at around 37 . Weak body resistance, automatically adjust the temperature to enable the body to maintain normal body temperature, the less easy to cold, so when the whole body or a local exposure to cold.
 
With hot water, shampoo, due to Slinky Wrap Dress With Draped Sleeves thermal effects, scalp capillary expansion, the rise of body heat to the surrounding radiation after shampooing the hair is wet, there are large amounts of water evaporated, so I will take away a lot of heat. Generally one gram of water evaporation to take away about 500 calories (heat of vaporization of water is 40.8 kJ / mol, which is equivalent to 2260 kJ / kg 1 kcal = 4.18 kJ, so the heat of vaporization of 1 kilogram of water 540.67 kcal 1 gram of water by the heat of vaporization of 540.67 cards per evaporate 1 gram of water, with a closing 540.67 calories). Increase heat dissipation, so that the body cold, and thus the reflectivity of the upper respiratory tract capillaries shrink local blood flow reduction, upper respiratory tract resistance to reduce the local pre-existing viruses or bacteria take advantage of growth and reproduction, resulting in respiratory tract infection, and thus you have flu symptoms such as runny nose, stuffy nose, headache and even fever. In general, before going to sleep is best not to shampoo. If you want to shampoo with a dry towel, then use the hairdryer to blow dry my hair before sleeping. In this way, not easy to have a cold. To remember, fell asleep in the hair is dry, it is vulnerable to cold.