A fume hood is a ventilated enclosure used in laboratories to safely handle hazardous substances. It works by drawing air into the hood and exhausting it outside, protecting users from harmful fumes, vapors, and dust. Fume hoods are essential for experiments involving toxic chemicals, ensuring a safer working environment. Typically made of glass and metal, a fume hood has a movable sash that allows users to access the workspace while minimizing exposure. Proper use and maintenance of a fume hood are crucial for laboratory safety, making it a vital component in research facilities and educational institutions.