Žáci v ochranných brýlí držící v hodině chemie kádinky - Stock fotografie a obrázky

Pupils in protective goggles holding beakers during chemistry lesson

Education, science, chemistry and children concept - kids or students with test tube making experiment at school laboratory

Education, science and children concept - boy in goggles with test tube studying chemistry at school laboratory

Education, science, chemistry and children concept - kids or students with test tube making experiment at school laboratory

Elementary School Science or Chemistry Classroom: Smart Little Boy wearing Safety Glasses Mixes Chemicals in Beakers

What you doing. Active shocked scared boy yelling while waving hands while girl experimenting with bulbs

Smiling schoolgirl holding beaker and looking at camera during chemistry lesson

Smiling teacher in white coat and protective goggles embracing pupils during chemistry lesson

Smiling schoolgirl holding beaker and doing chemical experiment during chemistry lesson

Smiling teacher in protective goggles standing in front of pupils during chemistry lesson

Optician holding lenses for trial frame while colleague examining kid with visual field test

Doctor in uniform and eyeglasses making injection in training pad near medical equipment and multiethnic students in white coats, emergency preparedness and skills development concept

Doctor waiting for female patient suffering from toothache in modern dental clinic

Handsome young dentist showing tablet to female client