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Argon Definition & Meaning - Merriam-Webster

Argon is often used when an inert atmosphere is needed. It is used in this way for the production of titanium and other reactive elements. It is also used by welders to protect the weld area and in incandescent light bulbs to stop oxygen from corroding the filament. 

What does argon do to the human body?  Higher levels can cause nausea, vomiting, unconsciousness, coma and death. No occupational exposure limits have been established for Argon. However, it may pose a health risk. Always follow safe work practices.