Ключевые слова: aid, background, beat, blood, blue, cardiologist, cardiology, care, check, color, composition, diagnosis, different, disease, doctor, emergency, examination, first, flat, health, heart, heartbeat, illness, items, kit, lay, leaves, listening, many, mask, measuring, medicine, medicines, object, pills, pressure, prevention, protective, pulse, rhythm, service, set, sickness, sphygmomanometer, stethoscope, tool, top, treatment, view, white,