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Test tubes are narrow vessels used in laboratories to hold, mix, heat, or observe small quantities of materials. Their open tops allow samples to be added or removed, while rounded bottoms help contain liquids; they are commonly placed in racks when several are handled together. The collection brings together test tubes associated with science, medical settings, and school learning, including examples containing colored liquid and a small group of tubes. Test tubes may be made from glass or plastic, with the choice depending on the sample and procedure.
7 images tagged with Test Tubes:
Science Test Tubes
Test Tube Containing Pink Liquid
Test Tube Clipart
Small Collection Of Test Tubes
Medical Test Tubes
Primary School Test Tubes
