11. They even have special gloves with extra insulation at the palms. 12. When a sudden burst of cold demanded extra insulation, tiny muscles in each hair follicle, called piloerectors, would contract, making each hair stand up. |
11. They even have special gloves with extra insulation at the palms. 12. When a sudden burst of cold demanded extra insulation, tiny muscles in each hair follicle, called piloerectors, would contract, making each hair stand up. |