| | Conditions Treatments | Brain Nervous System Does mucus come from the brain? Mucus is a viscous fluid produced by the mucous membranes, which line the respiratory, digestive, and urogenital tracts. It does not come from the brain. Brain Nervous System - Related Articles How to Get Rid of a Yeast Infection When Pregnant COBRA Insurance Rights & Dependents What are pediatric age ranges? Early Symptoms Schizophrenia How to Take Garlic for Health Clorox Treatment for Toenail Fungus Grief Counseling in Elementary Schools