الفهرس | Only 14 pages are availabe for public view |
Abstract 1The adenoids or the nasopharyngeal tomsail Porms a considerable part of the Waldeyer’s ring at the enterance of the respiratory system, It is related also to the Eustachian tube and post nasal space, The Waldeyer’s ring supposed to take an important role in the defence mechanism ,as it is situated in the upper respiratory tract, |