Ключевые слова: alveoli, anatomy, artery, background, biology, black, blood, care, clinic, concept, cure, design, diagnosis, disease, doctor, education, equipment, flat lay, gas, health, healthcare, healthy, hemoglobin, hospital, human, illustration, instrument, isolated, lung, medic, medical, medicine, oxygen, patient, pharmacy, physician, pinboard, pulmonary, red, respiration, respiratory, science, stethoscope, symbol, syringe, system, text, tool, tube, venous,