The exterior hull armor of all Borg vessels and stations have the capability of regenerating quickly and constantly, granting an enormous boost to survivability in prolonged battles. The exterior of the Cube's hull is covered in pipes and conduits which act like blood vessels and capillaries transporting automated regeneration units to the damaged areas, the A.R.U's work in conjunction with the memory alloy tritanium, the alloy returns the hull armour to its previous structural configuration as best it can with the remaining hull shards and the nanomachines distributed by the automated regeneration units seal together and repair the damaged hull armour. This method grants the vessel the capability of healing much like a biological body would. The creation and distribution of the automated regeneration units are governed by the ship's equivalent of a heart, the Automatic Regeneration Matrix.