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- Fibromuscular tube - Length- Width- Extent

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ACTS AS CROSSROAD:

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LAYERS: MucosaSubmucosaPharynringobasilar

fasciaMuscular coatBaccopharyngeal

fascia Pharyngial plexus

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MUSCLES OF PHARYNX:

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Gate way of tears

Paryngeal diverticula

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Retropharyngeal space. Parapharyngeal space.

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Extent:base of skull to tracheal bifurcation

Location:bet alar fascia n buccopharyngeal fascia covering muscles

Source of infection:parapharyngeal space,parotid,oesophagus,retropharyngeal nodes,spine.

Applied: Retropharyngeal abscess .

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-Extent:base of skull to hyoid bone & submandibular gland

-Location:Buccopharyngeal fascia covering lateral aspect of pharynx medially, n fascia covering pterygoid muscles, mandible n parotid gland laterally

-Sources of infection:peritonsillar abscess, parotid abscess, submandibular gland infection.

-Applied: Parapharynreal abscess.

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Anatomy

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Fossa of Rosenmuller Nasopharyngeal tonsil

(Adenoids) Nasopharyngeal Bursa Rathke’s Pouch Tubal tonsil Sinus of Morgagni Passavant’s Ridge Epithelial lining

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Rathke’spouch

Nasopharyngealbursa

Adenoids

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1. Warm n humidification of air

2. Pressure equilibrium.

3. Elevation of soft palate.

4. Resonating chamber.

5. Draining channel.

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Anatomy

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Ant wall:a) Base of tongue

b) Lingual tonsilsc) Valleculae

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Lat wall:a) Palatine tonsil

b) Anterior pillar(palatoglossal arch)c) Posterior pillar (palatopharyngeal

arch)

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1. Passage

2. Deglutition

3. Speech

4. Appreciation of taste

5. Local defence & immunitypgmedicalworld.com

Applied:children large n regress aft pubertyperitonsillar abscessTonsillectomyreffered pain:glossopharyngeal nerveseptic focus.

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Anatomy

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1. Pyriform sinus (fossa)A. anastetia of subepiglottic part of larynx.B. Reffered pain to ear in ca. of fossa.

2. Post-cricoid region- site for carcinoma

3. Posterior pharyngeal wall-extents from hyoid bone to cricoarytenoid jt.

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POSTERIOR VIEW OF PHARYNX

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1. Pathway

2. Speech n deglutition

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BLOOD SUPPLY:

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VENOUS DRAINAGE

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