Difference between revisions of "Oropharynx - Anatomy & Physiology"
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| Line 19: | Line 19: | ||
*Endoderm | *Endoderm | ||
| − | *Innervated by glossopharyngeal nerve (CN IX) | + | *Innervated by glossopharyngeal nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN IX]]) |
*Divided by glossopalatine arch from oesophageal pharynx | *Divided by glossopalatine arch from oesophageal pharynx | ||
| Line 49: | Line 49: | ||
==Innervation== | ==Innervation== | ||
| − | *Muscles from pharyngeal arch 4 innervated by vagus nerve (CN X) | + | *Muscles from pharyngeal arch 4 innervated by vagus nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN X]]) |
| − | *Stylopharyngeus from pharyngeal arch 3 innervated by glossopharyngeal nerve (CN IX) | + | *Stylopharyngeus from pharyngeal arch 3 innervated by glossopharyngeal nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN IX]]) |
==Histology== | ==Histology== | ||
| − | * Stratified squamous epithelium | + | *Stratified squamous epithelium |
*Keratinised in ruminants | *Keratinised in ruminants | ||
*Lamina propria contains aggregates of lymphoid tissue (called tonsils) in several parts of the oropharynx | *Lamina propria contains aggregates of lymphoid tissue (called tonsils) in several parts of the oropharynx | ||
Revision as of 14:01, 17 July 2008
Introduction
The pharynx is the chamber connecting the oral cavity, nasal cavity, oesophagus and larynx. The pharynx is divided into the nasal pharynx, oral pharynx and oesophageal/laryngeal pharynx which all have different functions, innervation and develope differently.
The oropharynx is the oral section of the pharynx.
Structure and Function
- Last molar rostrally
- Epiglottis caudally
- Tongue ventrally
- Soft palate dorsally
- Endoderm
- Innervated by glossopharyngeal nerve (CN IX)
- Divided by glossopalatine arch from oesophageal pharynx
Musculature
Constrictors
- Hyopharyngeus
- Thyropharyngeus
- Cricopharyngeus
Dilators
- Stylopharyngeus
Shorten
- Pterygopharyngeus
Close Pharyngeal Arch
- Palatopharyngeus
Innervation
- Muscles from pharyngeal arch 4 innervated by vagus nerve (CN X)
- Stylopharyngeus from pharyngeal arch 3 innervated by glossopharyngeal nerve (CN IX)
Histology
- Stratified squamous epithelium
- Keratinised in ruminants
- Lamina propria contains aggregates of lymphoid tissue (called tonsils) in several parts of the oropharynx