The device is a specialized form of external fixator, a circular fixator, modular in construction. Stainless steel (or titanium) rings are fixed to the bone via stainless heavy-gauge wire (called pins or Kirschner wires). The rings are connected to each other with threaded rods attached through adjustable nuts.he Ilizarov external fixators can be used to correct angular deformity in the leg, to correct leg-length differences, and treat non-unions. In most developing countries it is a highly specialized technique used mainly for deformity correction by experienced surgeons due to its complexity.
There are different zones not levels. The Killer Whale/ Orca Whale lives in the Epipelagic Zone. Also, known as the Sunlight Zone.
This species of whale are frequently found in the Atlantic and Russian waters of the Arctic. Their diet is mainly smaller ocean creatures like squid, fish and shrimp. The whale moves in a very slow I-have-all-the-time-in-the-world manner but swims, in fact, very fast when being pursued by a predator. This whale is endangered because of pollution, global warming and hunting.