Contrary to popular belief, a camel does not store water in its hump. It is in fact a mound of fatty tissue which it uses for nourishment when food is hard to find. When a camel uses its hump fat for sustenance, the mound becomes flabby and shrinks. If a camel draws too much fat, the shrunken hump will flop from it's upright position and hang down the camel's side. Food and a few days' rest will return the hump to its normal firm condition.
Camels have broad, flat, leathery pads with two toes on each foot.
When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. A camel usually only works as a beast of burden for six to eight months of the year. The rest of the time it needs to rest and recuperate, not unlike many of us.