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.
General Anesthesia (Definition) 1  General anesthesia is a medically induced coma and loss of protective reflexes resulting from the administration of one or more general anesthetic agents. It is a treatment that renders you unconscious during medical procedures, so you don't feel or remember anything that happens.