Camels can cross the deserts because their humps are filled with water; this is what we know! Well, we are all wrong. A camel’s hump is actually filled with fat. The bloodstream, where most of the 150 liters of water it drinks in a single go is stored, is the main source of its water.
Unlike other mammals, which have round blood cells, camels’ blood cells are oval, so they can slip easily through veins and arteries even when they are dehydrated, and they can also absorb lots of water without rupturing.
Camels also protect themselves against desert conditions by sweating far less than most animals; closing their elongated nostrils so that a large amount of water vapor in their exhalations is trapped and returned to their body fluids, reducing the amount of water lost through respiration producing dry feces and little urine, and reflecting sunlight from their coats. Even that fatty hump comes in handy. As the fat is converted to energy, it produces water as a byproduct. Although, the myth is false, it is half true in the long term.