The buccal mucosa is the inner lining of the cheeks and the back of the mouth. It is a moist tissue that helps protect the underlying structures and plays a role in oral health. This mucosa is rich in blood vessels and contains specialized cells that produce mucus, aiding in lubrication and digestion. In addition to its protective function, the buccal mucosa is important for the absorption of certain medications. Some drugs can be administered through this tissue, allowing for quicker absorption into the bloodstream. This method is often used in treatments involving buprenorphine and other medications.