How do camels survive long voyages in the desert?

Camels can manage for about two weeks without drinking water because they can store up to 150 litres of water in their bodies. Fat is also stored in their humps and this store of energy can sustain them for about 30 days without food. Furthermore, unlike most other mammals, camels can change their body temperature. At night they lower their body temperature considerably so that during the day the body warms slowly and they do not sweat much. Consequently, there is no loss of fluids early in the day.