674
beaker
biology
care
caucasian
chemist
chemistry
discovery
doctor
education
exam
expertise
group of people
healthcare and medicine
horizontal
hospital
hygiene
lab coat
laboratory
liquid
medical exam
medicine
microbiology
microscope
occupation
people
professional occupation
public building
research
science
scientific experiment
scientist
student
team
teamwork
technology
three people
tube
tubing
women
working