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The wall of pharynx consists of 4 layers:

1. Mucosa:

Epithelium:

Nasopharynx: respiratory epithelium "pseudostratified columnar ciliated with goblet cells".

Oropharynx: oral mucosa "non keratinized stratified squamous epithelium".

Lamina propria: Dense fibrous layer rich in elastic fibers - contains mucuos glands.

Pharyngeal mucosa lacks muscularis mucosae.

2. Submucosa: loose CT

3. Muscular layer: this is composed of inner longitudinal and outer oblique striated muscle.

4. Fibrosa: thin layer of fibrous CT.

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