Epipharynx is also called –
**Core Concept**
The epipharynx, also known as the nasopharynx, is the upper part of the pharynx, extending from the base of the skull to the upper surface of the soft palate. It is a key region in the respiratory and digestive tracts, where the Eustachian tube connects the middle ear to the nasopharynx.
**Why the Correct Answer is Right**
The epipharynx is also referred to as the nasopharynx because it is the part of the pharynx located above the soft palate, where the nasal cavity opens into the pharynx. This region is critical for the drainage of mucus and debris from the nasal cavity into the pharynx, and it also serves as a passage for air to enter the larynx during swallowing. The Eustachian tube, which connects the middle ear to the nasopharynx, plays a vital role in regulating middle ear pressure.
**Why Each Wrong Option is Incorrect**
**Option A:** Oropharynx - The oropharynx is the middle part of the pharynx, located between the nasopharynx (epipharynx) and the laryngopharynx (hypopharynx). It is not synonymous with the epipharynx.
**Option B:** Laryngopharynx - The laryngopharynx, or hypopharynx, is the lower part of the pharynx, extending from the cricoid cartilage to the esophagus. It is not the same as the epipharynx.
**Option C:** Hypopharynx - This is a synonymous term for the laryngopharynx, and it is not the correct answer.
**Clinical Pearl / High-Yield Fact**
The nasopharynx is an important region in the diagnosis and treatment of nasopharyngeal carcinoma, a type of cancer that arises from the epithelial lining of the nasopharynx. The nasopharynx is also a common site for the development of adenoid hypertrophy, which can cause nasal obstruction and sleep apnea.
**Correct Answer:** D.