The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
adenoids. 1  one of two masses of lymphatic tissue situated on the posterior wall of the nasopharynx behind the posterior nares. During childhood these masses often swell and block the passage of air from the nasal cavity into the pharynx, preventing the child from breathing through the nose.
When is Adenoid Removal Necessary. The adenoid. Adenoids are two masses of tissue that are located in the upper portion of the throat behind the nose. Also known as pharyngeal tonsils, adenoids are not as easy to see as tonsils are. ENT specialists may use mirrors, scopes or, in some cases, x-rays in order to examine these sponge-like tissues.