Because they have double eyelids to stop the sand getting in there eyes and they store lots of water in there humps so they can live there.Plus there feet stops the weight of them falling into the sand.
Why Do Camels Live In Deserts?
I don't know why but I know how they survive in the desert if you want to know. There nostrils are connected to there mouth and the snot has miosture.Yuck.Sorry I don't know the answer.