Sweat glands are little coiled up ducts. If you stretched them out and lined up all of the sweat glands in one human end to end, the line would be 1,972 miles (3,173 km) long.
Huge Variety of Usual and Unusual LaptopsSweat glands are little coiled up ducts. If you stretched them out and lined up all of the sweat glands in one human end to end, the line would be 1,972 miles (3,173 km) long.
Huge Variety of Usual and Unusual Laptops