Mucus is a vital bodily secretion that serves as a natural defense mechanism, lining various surfaces within the body to protect against pathogens and irritants. Its presence and characteristics can indicate underlying health conditions, making it an essential indicator for diagnosing illnesses. Understanding the definition , colors, causes, and associated conditions of mucus can provide valuable insights into one’s health status and aid in timely medical interventions. Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi). In medicine, sputum samples are usually used for a naked-eye examination, microbiological investigation of respiratory infections, and cytological investigations of respiratory system. Mucus is a clear, slippery, gel-like substance that’s part of your immune system. It lines your mucous membranes and helps trap and destroy or clear out germs and harmful particles. It’s also called phlegm, snot or sputum . Sputum, or phlegm , is produced when the airways in the lungs become inflamed or irritated. While some mucus production is normal (especially in the early morning), excessive, persistent, discolored, or foul-smelling sputum suggests something is wrong.
