Keywords
20-24 years, 20s, biology, caucasian appearance, demonstration, education, human biology, human body part, interior, laboratory, learning, lesson, mid adult, mid adult men, multiracial group, pupil, scientific education, skeleton, student, study, teacher, teenage girls, teenager, three people, top section, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u30311147