Difference between revisions of "Oropharynx - Anatomy & Physiology"
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==Introduction== | ==Introduction== | ||
| − | The [[ | + | The [[Pharynx - Anatomy & Physiology|pharynx]] is the chamber connecting the [[Oral Cavity Overview - Anatomy & Physiology|oral cavity]], nasal cavity, [[Oesophagus - Anatomy & Physiology|oesophagus]] and [[Larynx - Anatomy & Physiology|larynx]]. The [[Pharynx - Anatomy & Physiology|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 - Anatomy & Physiology|pharynx]]. | The oropharynx is the oral section of the [[Pharynx - Anatomy & Physiology|pharynx]]. | ||
Revision as of 11:06, 29 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