Final answer:
The posterior wall of the pharynx contains the oropharynx, pharyngeal tonsil, and laryngopharynx.
Step-by-step explanation:
The posterior wall of the pharynx contains several structures. One of these structures is the oropharynx, which is similar to the oral cavity and has a stratified squamous epithelium with mucus-producing glands. Another structure found in the posterior wall is the pharyngeal tonsil, which is located on the roof of the nasopharynx. Additionally, the laryngopharynx, the last portion of the pharynx, is also part of the posterior wall. It connects to the larynx and contains the vocal folds.