Ключевые слова: adult, analysis, analyzing, arm, armchair, bag, blood, body, care, clinic, donate, donating, donation, donor, drip, expertise, giving, hand, healing, health, hematologic, hemology, hemotransfusion, hospital, indoors, instrument, laboratory, medical, medicine, receiving, samples, science, syringe, test, test tubes, transfusion, tube, volunteer,