Ключевые слова: adult, analysis, analyzing, arm, background, bag, ball, blood, bouncy, care, caucasian, clinic, doctor, donate, donating, donation, donor, expertise, hand, healing, health, healthcare, hospital, indoors, injecting, injection, laboratory, male, man, medical, medicine, microscope, needle, nurse, patient, receiving, red, sample, science, sitting, sterile, surgical, syringe, technology, test, transfused, transfusion, vein, volunteer, woman,