Circle the term that does not belong in each of the following groupings.
1. Sphenoidal Maxillary Mandibular Echmoidal Frontal
2. Nasal Cavity Trachea Alveolus Larynx Bronchus
3. Apex Base Hilum Larynx Pleura
4. Sinusitis Peritonitis Pleurisy Tonsillitis Laryngitis
5. Laryngopharynx Oropharynx Transports air and food Nasopharynx
6. Alveoli Respiratory zone Alveolar sac Main bronchus