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Phlegm is also called sputum. Sputum refers to secretions originating from the bronchi and lungs. Among them, it is a sticky, mucousy liquid, and it is said that about 100ml is secreted per day even in a normal person. Can sputum really be eliminated? Let's find out everything about sputum from 'A to Z' with Professor Oh Yeon-mok of the Department of Respiratory Medicine at Seoul Asan Medical Center. In charge: Lee Jae-wan, Jeong Jin-hee #Bronchiectasis #Sputum #Korean Respiratory Tuberculosis Society ✔ If you want to enjoy more fun and informative videos from After the Rain, please click 'Like' and 'Subscribe' a lot! ✔ After the Rain Official Channel Homepage http://aftertherain.kr