Alunos segurando estruturas moleculares enquanto sentados em sala de aula durante a aula de química - Banco de fotos e imagens

Smiling schoolgirl with beakers doing chemical experiment during chemistry lesson

Student during experiment. Dark-haired teacher dropping liquid in test tube while whole group waiting for reaction

Schoolgirl making experiment with teacher and pupils in chemistry class

Helping with pleasure. Charming young chemistry teacher adding chemical to a test tube while helping a group of her students with an experiment

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

Female optometrist with 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

Dentists checking patient teeth in modern clinic

Female ophthalmologist with lenses for trial frame while colleague examining kid with visual field test

Schoolboys with backpacks looking at camera near blackboard with educational icons