exists and is an alternate of . The four types of membranes are: 1) cutaneous membranes; 2) serous membranes; 3) mucous membranes; and 4) synovial membranes. Mucous membranes are tissues that line body cavities or canals such as the throat, nose, mouth, urethra, rectum, and vagina.
A laryngeal mask. A laryngeal mask airway â also known as laryngeal mask and supraglottic airway â is a medical device that keeps a patient's airway open during anaesthesia or unconsciousness.
URL of this page: //medlineplus.gov/ency/article/007410.htm. General anesthesia is treatment with certain medicines that puts you into a deep sleep so you do not feel pain during surgery. After you receive these medicines, you will not be aware of what is happening around you.