The principal parts of the upper Surface of the vocal tract:
Nasal cavity
Oral cavity
Lips
Teeth
Hard palate
Soft palate (Velum)
Uvula
Alveoral ridge
Pharynx wall
The principal parts of the lower surface of the vocal tract:
Tongue (tip, blade, front, back, roof)
Epiglottis
Larynx
Vocal folds
Trachea
Glottis
Lungs
Kaaati