It is a domesticated work animal in extensive areas worldwide found mainly in Africa, where all camels are Arabian and in Asia, where there are many Bactrian camels (double hump) and it is only in Australia where they are found in the wild. They are herbivorous mammals and give birth after a gestation period of 15 months. Arab camels do not sweat up to 42°C body temperature. They store energy through their hump which can reach up to 36 kg and consists of fat and fiber tissue. The concentration of fat in one area of the body and not in the subcutaneous tissue, helps with the removal of heat from the body. At temperatures up to 40°C they can withstand water for up to 15 days. Moreover, they can withstand water loss of more than 30% of their body mass, which would be lethal to other mammals, and they can even drink sea water. A camel can carry up to 300 kilograms for over 20 km for a long time. Their presence in the inhospitable desert where they live is invaluable because without them the survival of the people there would be extremely difficult, and their transport impossible.