LOCATION: Base ofthe skull to the level of C6, where it is continuous with the esophagus
SUBDIVISIONS: 1)Nasopharynx, 2) Oropharynx, 3) Larynopharynx
- With openings foreach 1) Choanae, 2) Oropharyngeal Isthmus and 3) Laryngeal inlet, respectively
Functions of the Pharynx
Respiratory and digestive
Respiratory functions of the pharynx
Air passes from the nasal cavity to the nasopharynx andpasses anteriorly to enter the larynx
Digestive functions of the Phaynx
Food passes from the oral cavity---> Oropharynx--->laryngopharynx ---> esophagus (with the epiglottis closing the laryngeal inlet)
There are two groups of pharyngeal muscles, which include:
Circular Constrictor:Superior , Middle and Inferior
- External muscles which help with swallowing
Longitudinal/Oblique: Stylopharngeus, Palatophrangeus and Salpingopharyngeus
- Internal muscleswhich help elevate the pharynx during swallowing and in speech
Three paired muscles (Superior, Middle and Inferior Constrictors) which attach on the back of the pharynx at an area called Pharyngeal Raphe. With the two inferior constrictors stack on top of the superior constrictor.
- They contract in order from superior to inferior
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