The Pharynx Study Notes - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

402

Pages:

2
Author:

Mariam A. A.

THE PHARYNX ● ● Muscular tube common to both the respiratory and digestive system (air and food) Split into 3 parts - Epithelium tells you what's going into that area 1. Nasopharynx - Where the air first goes into (Air only) - Pseudostratified columnar epithelium, simple layer (mucus secreting) - Not for mechanical stress (burning feeling when water/liquid goes there) - Roof of the nasal cavity to the soft palate - Respiratory epithelium (only designed for air and mucus) → simple layer 2. Oropharynx - Oral cavity - Stratified squamous epithelium (non keratinised) - Withstand the mechanical stresses of food - Soft palette to the epiglottis - Also has food and other fluid passing through 3. Laryngopharynx - Associated with the larynx - Epiglottis to the opening of the airways - The oesophagus is distal to the laryngopharynx - Stratified non keratinized epithelium (also has food and other fluid passing through) Note: - Respiratory epithelium in the nasopharynx The others have stratified non keratinized epithelium Respiratory epithelium returns in the larynx and the following structures Oesophagus also has respiratory epithelium Point where the larynx and esophagus meet, there would be transition between stratified and respiratory (epithelium)

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