All of the following structures are within the parotid gland except
**Core Concept**
The parotid gland is a major salivary gland located in the preauricular region, playing a crucial role in the production of saliva. It is a complex structure composed of various tissues and organs, including serous and mucous glands, lymph nodes, and nerves.
**Why the Correct Answer is Right**
The parotid gland contains the facial nerve (cranial nerve VII), which is responsible for controlling facial expressions, taste, and other functions. Additionally, the parotid gland has the parotid lymph nodes, which are part of the lymphatic system and help in the drainage of lymph fluid. The gland also contains the parotid duct, also known as Stensen's duct, which opens into the oral cavity to release saliva. However, the structures not within the parotid gland are the submandibular gland, the sublingual gland, and the lingual nerve.
**Why Each Wrong Option is Incorrect**
**Option A:** The submandibular gland is actually located below the mandible (lower jawbone) and is another major salivary gland.
**Option B:** The sublingual gland is situated under the tongue and is a minor salivary gland.
**Option C:** The lingual nerve is a branch of the mandibular division of the trigeminal nerve, which provides sensation to the tongue and is not located within the parotid gland.
**Clinical Pearl / High-Yield Fact**
The parotid gland is a common site for the development of salivary gland tumors, such as pleomorphic adenomas and mucoepidermoid carcinomas.
**Correct Answer: A. The submandibular gland.**