A). Trachea
(B). Cartilage
(C). Vocal cord
(D). Epiglottis
(1) Buccal cavity
(2) Nasal Cavity (open to pharynx)
(3) Inferior maxillary sinus
(4) Superior maxillary sinus
(5) Frontal sinuses
(6) Guttural pouch
(7) Pharynx
(8) Trachea
(9) Bronchus
(10) Alveolus
(11) Lungs
(12) Larynx