The hump of the camel is made up of :

The hump of a camel is made up of fat tissue.
Camels store fat in the hump, which is later converted into energy and water, helping them survive long periods without food and water in desert conditions.

The dromedary camel has one hump, while the Bactrian camel has two humps.

The hump shrinks or bends when the stored fat is used up.

Storing fat in one place helps the camel avoid overheating, which would happen if fat were spread over its whole body.