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.
Knowledge center. Adenoids, also known as pharyngeal tonsil, or nasopharyngeal tonsil are located at the back of the throat, above the tonsils-they are small lumps of tissue.They form part of the immune system of babies and young children; they protect the body from harmful bacteria and viruses, they fight off infection.nlike the tonsils, which can be seen if you open your mouth and look into the mirror, adenoids can only be seen when the doctor uses a light and a small mirror, or a flexible telescope. Adenoids trap germs when they enter the body.