Ключевые слова: background, beautiful, black, cardiac, cardiology, care, check, checkup, clinic, clinical, closeup, concept, device, diagnostic, disease, doctor, equipment, examination, function, functional, headphones, health, healthy, heart, heartbeat, hospital, illness, influenza, instrument, isolated, life, listen, lung, measurement, medical, medicine, metal, nature, nurse, patient, physical, pulse, science, stethoscope, table, test, tool, treatment, white, work,