Question

The outer layers of human skin are composed of dead cells impregnated with keratin and oil, which make the epidermis relatively impermeable to water, yet humans sweat freely in hot temperatures. This occurs because:_________.

Answer 1

Step-by-step explanation:

Because there is salt in the sweat, it makes it possible to go through the skin, and sweat glands have unique little channels that allow salt to go through them and reach the skin. What moves it though the skin, is an osmotic gradient. Therefor, sweating only occurs in certain body parts where the skin can absorb and let out water of any kind.