How Camels Survive in the Desert
Many people believe that a camel’s hump is full of water. In fact, the hump stores fat, which the camel’s body can break down for energy when food is scarce. Keeping its fat in one place, rather than spread under the skin all over its body, may also help the camel lose heat more easily.
Camels have several ways of saving water. Their kidneys remove as much water as possible from their waste. Their body temperature can rise by several degrees during the hottest part of the day before they start to sweat, so they sweat less and lose less water. Even their noses help: as a camel breathes out, its nose recaptures much of the moisture in its breath. When a camel does find water, it can drink a remarkable amount very quickly, sometimes more than 100 liters in about ten minutes.
None of this makes camels immune to heat and thirst. Together, however, these features allow them to travel long distances in places where most large animals could not survive. For this reason, people in dry regions have relied on camels for thousands of years to carry goods across the desert.