A fume hood is a ventilated enclosure used in laboratories to safely handle hazardous substances. It works by drawing air into the hood, which helps to contain harmful fumes, vapors, and dust, protecting users from exposure. Fume hoods are essential in chemical, biological, and pharmaceutical research settings. These devices are equipped with a sash that can be raised or lowered to control airflow. Proper use of a fume hood ensures that toxic materials, such as chemicals and biological agents, are effectively contained, minimizing the risk of accidents and maintaining a safe working environment for laboratory personnel.