The answer is oropharynx.
The reason for this type of epithelium in this region of the respiratory tract is due to
its proximity to the esophagus. This
means that this region of the respiratory
tract is subject to abrasion by food
passing down the esophagus. This
epithelium is continuous with that of the esophagus.
Oropharynx communicates with the mouth through the isthmus of the throat. It is a small space in the oral cavity between the root of the tongue, the soft palate and the epiglottis. It is the only portion of the oral cavity corresponding to a real cavity. The epithelial laryngeal lining is characterized by a non-keratinized stratified squamous epithelium.
In oxygenic photosynthesis, the first electron donor is water, creating oxygen as a waste product. In anoxygenic photosynthesis various electron donors are used. Cytochrome b6f and ATP synthase work together to create ATP. This process is called photophosphorylation, which occurs in two different ways.
