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.
A ventilator often is used for short periods, such as during surgery when you're under general anesthesia (AN-es-THE-ze-ah). The term anesthesia refers to a loss of feeling and awareness. General anesthesia temporarily puts you to sleep. The medicines used to induce anesthesia can disrupt normal breathing.