Metazoat (multicellular organisms)
Unlike the lower evolutionary rate of protoazave, metazoat characterized by cellular structure consisting because these organisms organizational system is multi-cellular construction, as p.sh humans organizational system is one built on the principle: atom - moIekule - cell - tissue - organ - organ system - the body.
Eukaryotic cells have complex cellular structure and function of different specialties, some of them are treated with strong links which pëmibajnë extracellular Ca + and As +. Freshwater forms have contractile vacuole. Most of them have oral camera with intricate construction, through which they receive food or actively hunt prey.
