Term
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Definition
-Musculomembranous tube
-Extends from basilar portion of occipital bone to level of cricoid cart of larynx.
-communications: -Cranially with ear and nasal and oral cavities
-caudally w larynx and esophagus
-common channel for digestion and respiration |
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Term
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Definition
Nasopharynx: base of skull to soft palate
Oropharynx: soft palate to upper border of epiglottis
Laryngopharynx:cranial border of epiglottis to esophagus (C4-C6) |
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Term
Nasopharynx
Communication |
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Definition
| anteriorly w posterior nasal aperture (choanae) |
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Term
Nasopharynx
Important structures |
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Definition
Opening(ostium of the auditory tube)
-Choanae(opening to nasal cavity)
-torus tubarium(surrounds auditory tube)
-salpingopharyngeal fold(comes off auditory tube)
-Pharyngeal tonsils( adenoids)
-Pharyngeal recess (space) |
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Term
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Definition
anteriorly w the oral cavity through the isthmus of the fauces
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Term
Oropharynx
Important structures
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Definition
Pillars of fauces:-Palatoglossal arch(fold)
-Palatopharyngeal arch(fold)
-Depression between arches for the palatine tonsilis
-soft palate and uvula
-Valleculae |
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Term
Laryngopharynx
Communication |
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Definition
Anteriorly and laterally to larynx
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Term
laryngopharynx
important structures |
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Definition
-laryngeal inlet
-epiglottis
-piriform recess |
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Term
| Layers of pharyngeal wall |
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Definition
-mucous membrane
-Tela submucosa (pharyngeal aponeurosis)
-Muscular layer(pharyngobasilar fascia)
-Buccopharyngeal fasica |
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Term
Muscular layer of pharynx
Constrictor MM and function
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Definition
-Superior constrictor
-middle constrictor
-inferior constrictor
Function: Move bolus of food down towards longitudinal mm. |
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Term
Muscular layer of pharynx
Longitudinal mm. and function |
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Definition
-stylopharyngeus
-palatopharyngeus
-salpingopharyngeus
Function: elevate pharynx towards bolus of food or water then relax and let it passively slide down. |
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Term
Innervation of pharynx:
Pharyngeal plexus
Motor |
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Definition
-Stylopharyngeus m. - Glossopharyngeal n
-all others - Pharyngeal plexus (CNXI via CNX) |
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Term
Innervation of pharynx:
Pharyngeal plexus
Sensory |
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Definition
Nasopharynx: Maxillary n. (V2)
Oropharynx: Glossopharyngeal n (CN IX)
Laryngopharynx: Vagus n. (CN X) |
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Term
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Definition
-ascending pharyngal a(external carotid)
-ascending palatine and tonsillar aa.(Facial a)
-Maxillary a(lesser palatine a.)
-inferior thyroid and superior thyroid aa.
-Venous drainage by pharyngeal plexus of veins |
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