endotracheal tube: a catheter that is inserted into the trachea through the mouth or nose in order to maintain an open air passage or to deliver oxygen or to permit the suctioning of mucus or to prevent aspiration of the stomach contents
catheter: a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open
microgliacyte: a cell of the microglia that may become phagocytic and collect waste products of nerve tissue