Which of the following part is NOT included in hypopharynx-
**Core Concept**
The **hypopharynx** is the lower part of the **pharynx**, extending from the **hyoid bone** to the lower border of the **cricoid cartilage**. It is divided into three sub-sites: the **pyriform sinus**, the **postcricoid area**, and the **posterior pharyngeal wall**.
**Why the Correct Answer is Right**
The correct answer choice is not provided, however, the **nasopharynx** and **oropharynx** are the other two parts of the pharynx, with the **nasopharynx** being the upper part and the **oropharynx** being the middle part. The **hypopharynx** does not include the **nasopharynx** or the **oropharynx**.
**Why Each Wrong Option is Incorrect**
**Option A:** No information is provided to determine why this option is incorrect.
**Option B:** No information is provided to determine why this option is incorrect.
**Option C:** No information is provided to determine why this option is incorrect.
**Option D:** No information is provided to determine why this option is incorrect.
**Clinical Pearl / High-Yield Fact**
The **hypopharynx** is a critical area for swallowing, and lesions in this area can lead to significant morbidity, including **dysphagia** and **aspiration pneumonia**.
**Correct Answer:** Correct Answer: D. Nasopharynx.