You can purchase desert robes and waterskins before entering the desert, and that usually keeps you cool and not thirsty making you completely safe to roam.
They open their mouths
they use it for to keep cool
they dig a burrough in the ground to keep cool
The king snake survives in the desert by burying in the sand to keep cool. It also camouflages itself to keep itself from being seen.
It keeps cool by staying under shade and long grass
long ears to keep it cool and tanned fur to camouflage it
They have big ears that help keep heat out.
No.
In the desert. For members only.
they live in wet dirt so they can keep cool.
granite can be minned via the desert. here's a guide i found on runescape:
Buy it in the Grand Exchange