What specific protective structure are the famous 'warts' on a male warthog's face?

Answer

Thick pads of skin composed of connective tissue

The characteristic facial growths known as warts are not true tumors or warts in the medical sense, but rather distinct features composed of thick pads of skin rich in connective tissue. These structures develop prominently, especially in males, where the larger pads situated below the eyes and smaller pads near the mouth act as crucial protective padding. This protection is necessary during intense, ritualistic head-butting contests that occur over territory and potential mates within the warthog social structure.

What specific protective structure are the famous 'warts' on a male warthog's face?
mammalcharacteristicphysicalwarthog