Complex sentence: The thorny dragon's scales are ridged, enabling the animal to collect water from any part of its body by simply touching water, usually with their limbs; via the capillary principle water is transported to the mouth through their skin.
Split into simpler sentences: The thorny dragon's scales are ridged, enabling the animal to collect water from any part of its body. So to drink water, they touch water, usually with their limbs, and via the capillary principle, water is transported to the mouth through their skin.