Class notes
Bio 151 Pharynx Study Notes
- Course
- Bio 151
- Institution
- Delaware County Community College
This is a comprehensive and detailed note on the pharynx. *Essential and Valuable Study Material!!
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● Thus, these sinuses are extensions of the nasal chambers into the skull bones● For this reason, they are known as paranasal sinuses
● c. Pharynx
● The pharynx (FAIR-inks) is the common posterior space for the respiratory and digestive
systems
● (1) Nasopharynx
● That portion of the pharynx specifically related to the respiratory system is the
nasopharynx
● It is the portion of the pharynx above the soft palate
● The two posterior openings (nares) of the nasal chambers lead into the single space of
the nasopharynx
● The auditory (eustachian) tubes also open into the nasopharynx
● The auditory tubes connect the nasopharynx with the middle ears
● This will equalize the pressure between the outside and inside of the eardrum
● Lying in the upper posterior wall of the nasopharynx are the pharyngeal tonsils
(adenoids)
● The soft palate floor of the nasopharynx is a trapdoor which closes off the upper
respiratory passageways during swallowing
● (2) Oropharynx.
● The portion of the pharynx closely related to the digestive system is the oropharynx
● It is the portion of the pharynx below the soft palate and above the upper edge of the
epiglottis
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