Ключевые слова: adult, analyzing, arm, background, black, blood, body, care, chair, clinic, closeup, donate, donation, donor, expertise, health, hospital, indoors, injecting, injection, laboratory, male, man, medical, microscope, needle, nurse, part, patient, red, sample, science, serum, service, sterile, surgical, syringe, technician, technology, transfused, transfusion, vein, volunteer, woman, young,