frontal sinus nasal cavity external naris hard palate oral cavity tongue epiglottis larynx trachea nasopharynx eustachian tube opening uvula tonsils pharynx esophagus
	adam's apple thyroid cartilage cricoid cartilage tracheal cartilages primary bronchi trachea
	nasal cavity pharynx larynx trachea primary bronchi lung upper respiratory tract lower respiratory tract
	frontal sinus superior nasal concha middle nasal concha inferior nasal concha vestibule of nose external naris hard palate soft palate uvula eustachian tube opening pharyngeal tonsil internal naris sella turcica sphenoid sinus cribiform plate of ethmoid bone
	right primary bronchi right superior lobe oblique fissure trachea left primary bronchi left secondary bronchi left tertiary bronchi left terminal bronchioles left superior and inferior lobes right middle lobe right inferior lobe cardiac notch left plural sac pleural fluid diaphragm muscle alveolar duct alveoli
	trachea primary bronchi secondary bronchi tertiary bronchi terminal bronchiole alveolar duct alveoli