Ключевые слова: analyzing, arm, bag, ball, blood, bouncy, care, caucasian, clinic, donate, donating, donation, donor, expertise, giving, hand, healing, health, hemotransfusion, hospital, indoors, injecting, injection, instrument, laboratory, life, male, man, medical, medicine, needle, patient, person, receiving, red, rubber, sample, science, serum, squeeze, sterile, surgical, syringe, test, transfused, transfusion, tube, tubing, vein, volunteer,