25yr old/9yr smoking history, quit2mnths ago, clear chest xray, lungs sound clear, clear throat con. coughed up decent sized streak of blood,lung can?

Good for you!: Congratulations on quitting smoking! The symptoms you describe are common in newly-quit ex-smokers. Cilia are tiny hair-like structures in the bronchioles of the lung that normally act to carry bacteria and foreign bodies from the lungs. The cilia become non-functional in smokers, resulting in an accumulation of debris in the lungs.