Mucosa is moist tissue that lines certain parts of the inside of your body. It is in your nose, mouth, lungs, and the urinary and digestive tracts. Glands in this tissue release a thick fluid called mucus.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, and Stephanie Slon.