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

Sweat glands have special channels through skin.

Step-by-step explanation:

Skin is made up of dead cells impregnated with keratin and oil which makes our epidermis relatively impermeable but even then human tends to sweat freely during hot temperature because there are glands called sweat glands present in the dermis layer of skin. These sweat glands have special channels or ducts that open outside the epidermis.

In summer when temperature rises these glands release sweat which evaporates and causes cooling of the body. This helps in thermoregulation. So the right answer is - sweat glands have special channels through skin.