Mucosa is moist tissue that lines some organs and body cavities throughout the body, including your nose, mouth, lungs, and digestive tract. Glands along the mucosa release mucus (a thick fluid).
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.