Tonsils
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A. Pharyngeal tonsil
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Tonsils
A. Pharyngeal tonsil
- Is found in the posterior wall and roof of the nasopharynx and is called an adenoid when enlarged.
- Lies on each side of the oropharynx in an interval between the palatoglossal and palatopharyngeal folds.
- Receives blood from the ascending palatine and tonsillar branches of the facial artery, the descending palatine branch of the maxillary artery, a palatine branch of the ascending pharyngeal artery, and the dorsal lingual branches of the lingual artery.
- Is innervated by branches of the glossopharyngeal nerve and the lesser palatine branch of the maxillary nerve.
- Is a collection of lymphoid nodules near the pharyngeal opening of the auditory tube.
- Is a collection of lymphoid follicles on the posterior portion of the dorsum of the tongue.
- Is a tonsillar ring of lymphoid tissue at the oropharyngeal isthmus, formed by the lingual, palatine (faucial), tubal (eustachian), and pharyngeal tonsil.
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