https://joy.videvo.net/videvo_files/video/free/2019-03/large_watermarked/181004_10_LABORATORIES-SCIENCE_09_preview.mp4 Injecting Sample into Test Tube Close up of a scientist's hand injecting a sample into a glass test tube. 1080pbeakerbiologistbiologychemistchemistrycontainerdiscoveryequipmentexperimentglasslablaboratoryneedlepipetteresearchsamplesciencescientifictest tubeTube