mucous membrane

synonym: mucosa
https://doi.org/10.1351/goldbook.10978

Layer of epithelial tissue with a thin underlying layer of connective tissue (the lamina propria) that lines many body cavities, including the gut, respiratory passages, and tubular organs; it secretes, and is covered in, mucus.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 781 [Terms] [Paper]