Dromedary camels have only one hump. Their hump is not used to store water like most people think. Instead, it is used to store fat resources which are used when food and water is scarce. They will eat any vegetation they can find and can drink up to 50 gallons of water at a time.
Camels have adapted to living in the desert by growing long eyelashes to protect their eyes from sun and sand. They can also completely close off their nostrils to keep sand out. Camels are used today for work, food, clothing, transportation and sport racing.