The Camel is notorious for being able to survive in some of the driest and most hostile conditions known around the globe. Camels did not originate in the deserts of Africa like most people believe, however. These animals are closely related to horses and crossed from the Americas into Eurasia via the Bering straight over 6 million years ago. From thousands of years of evolutions and environmental factors, the camel developed a body that is so unique that it can not be compared to any other organism.
The most identified adaptations of the Camel are the humps on their back. These humps are fatty deposits and are not actually for the storage of water. Instead, these humps are used for energy storage. When walking through the desert, it is very rare to find food. These humps help the animal survive these long stretches. If the hump begins to flatten or droop it means that the Camel has been using most of its stored energy.
So, how does a Camel last such a long time without water then? A Camel actually has a very complicated cardiovascular system in which water is stored. This advanced system allows the Camel to drink up to 20 gallons of water at one time and store it for 15 days!