Complex sentence: Babirusas are notable for the long upper canines in the males, that emerge vertically from the alveolar process, penetrating though the skin and curving backward over the front of the face and towards the forehead.
Split into simpler sentences: Babirusas are notable for the long upper canines in the males. The upper canines of male babirusa emerge vertically from the alveolar process, penetrating though the skin and curving backward over the front of the face and towards the forehead.