Unit 4 - General info

• cavities that reduce the weight of a bone
• increases surface area
• affect voice quality

• frontal sinuses 
• maxilarry sinuses
• ethmoid sinuses
• mastoid air cells

are located in the frontal bone between the eyes

are the largest set of sinuses

empty space within the bones 

• Buccal cavity
• Oral cavity
• Pharyngeal cavity
• Nasal cavity 

space between cheeks and gums

from teeth to the back of soft palate

makes up the throat

the nostrils and portion of the pharynx behind nose

often referred to the shape of the upper lip

medial, vertical gully between upper lip and nose

the internal medial surface of the upper lip and lower lips are band of tissue that attach each to the gums

three sets of tonsils

• Palatal tonsils
• Pharyngeal tonsils
• Lingual tonsils

• located between the anterior and posterior faucial pillars
• the tonsils that most people refer to when they say "tonsils"

• known as adenoids
• located in nasopharynx
• when enlarged, they may obstruct the opening of Eustachian tube, causing a mild-moderate conductive hearing loss

on the root of tongue